{"title":"Open Heart Mod Watches","description":"\u003cp\u003eAn open heart dial cuts an aperture into the face so you can watch the balance wheel beat. It is the clearest reminder that nothing inside is running on a battery, and it is the single feature people ask about most when they see one on a wrist.\u003c\/p\u003e\n\u003ch3\u003eWhat you are looking at through the window\u003c\/h3\u003e\n\u003cp\u003eThe balance wheel oscillates six times a second, which is what produces the sweep of the seconds hand rather than a tick. On a closed dial you infer that. On an open heart you watch it. The aperture sits at the lower left of the dial, so it is visible without dominating the face or costing you legibility.\u003c\/p\u003e\n\u003ch3\u003eTwo colourways\u003c\/h3\u003e\n\u003cp\u003eChocolate and royal blue, both A$349. Chocolate is the warmer and more unusual of the two and pairs well with brown leather and tan. Royal blue is the easier daily wear and reads closer to formal under a cuff.\u003c\/p\u003e\n\u003ch3\u003eBuild\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Seiko NH38, the open heart variant of the NH35 family, 41 hour power reserve.\u003c\/li\u003e\n\u003cli\u003eSapphire crystal.\u003c\/li\u003e\n\u003cli\u003e316L stainless steel case on an integrated bracelet, 39mm.\u003c\/li\u003e\n\u003cli\u003e5 ATM, 50m. Splash and everyday wear, not swimming or diving.\u003c\/li\u003e\n\u003cli\u003e1 year warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOrdering\u003c\/h3\u003e\n\u003cp\u003eMade to order and sized to your wrist, free Australian shipping.\u003c\/p\u003e\n\u003cp\u003eSee how the \u003ca href=\"\/collections\/nautilus\"\u003eintegrated bracelet builds\u003c\/a\u003e differ, or \u003ca href=\"\/collections\/all\"\u003ebrowse everything\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"nautilo-mod-open-heart-chocolate","title":"Nautilus (Open Heart, Chocolate) | NH38 Custom Mod Watch","description":"\u003cp\u003eThere is a hole in this dial, and it is the best part.\u003c\/p\u003e\n\n\u003cp\u003eChocolate brown across the face, warm under any light, with a window cut into it so you can watch the balance wheel swing back and forth. That is the engine, uncovered, running in front of you. The rose gold bracelet picks up the brown and turns the whole watch into one block of warm colour. The design it echoes sits behind jeweller's glass.\u003c\/p\u003e\n\n\u003cp\u003ePut it on for an ordinary Tuesday and watch what happens. People look at your wrist, then look again, because something on it is moving. You say thanks and get on with your day.\u003c\/p\u003e\n\n\u003ch2\u003eThe engine is on show because it is real\u003c\/h2\u003e\n\n\u003cp\u003eUnderneath is the Seiko NH38 automatic: 21,600 beats per hour, hacking seconds, hand-winding, and about 41 hours of power reserve. It runs without a date, which is exactly what makes room for the open heart. No battery, ever.\u003c\/p\u003e\n\n\u003cp\u003eAround it: a sapphire crystal that shrugs off keys and door frames, and a brown dial opened up at the front so the balance wheel is part of the view instead of something hidden behind it.\u003c\/p\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMovement\u003c\/td\u003e\n\u003ctd\u003eSeiko NH38 automatic, open heart, no date, 21,600 bph, approx. 41-hour power reserve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDial\u003c\/td\u003e\n\u003ctd\u003eBrown, open heart aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBracelet\u003c\/td\u003e\n\u003ctd\u003eRose gold tone metal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrystal\u003c\/td\u003e\n\u003ctd\u003eSapphire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater rating\u003c\/td\u003e\n\u003ctd\u003e5 ATM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat this price actually buys\u003c\/h2\u003e\n\n\u003cp\u003eThe watch this design echoes sells for hundreds of times this price, and a routine service on it costs more than this entire watch. Here, one price buys the whole thing: a genuine Seiko automatic under sapphire, built to order for you and regulated by hand. Nobody needs to know what it cost. That part is yours.\u003c\/p\u003e\n\n\u003cp\u003eOrder yours and start your build. You will get photos of your finished watch before it ships. Then you will get the watch.\u003c\/p\u003e","brand":"Rosevari Watches","offers":[{"title":"Default Title","offer_id":41934687338562,"sku":"RV-NAUT-OHCHOC","price":349.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/5107\/4882\/files\/nautilo-mod-open-heart-chocolate.png?v=1786277940"},{"product_id":"nautilo-mod-open-heart-royal-blue","title":"Nautilus (Open Heart, Royal Blue) | NH38 Custom Mod Watch","description":"\u003cp\u003eRoyal blue, with a window cut straight through to the movement.\u003c\/p\u003e\n\n\u003cp\u003eThe dial is deep blue and perfectly still until the light moves across it, and near the top there is an opening where the balance wheel swings back and forth all day long. A silver bezel and a link bracelet keep everything else quiet so the moving part stays the star. The design it echoes sits behind jeweller's glass.\u003c\/p\u003e\n\n\u003cp\u003ePeople stopped noticing watches years ago. They still notice movement. This one pulls eyes across a table, and then you go back to your coffee like nothing happened.\u003c\/p\u003e\n\n\u003ch2\u003eAn open heart only works when the heart is real\u003c\/h2\u003e\n\n\u003cp\u003eThe Seiko NH38 automatic runs at 21,600 beats per hour, hacks its seconds when you pull the crown, takes a hand-wind whenever you want one, and holds about 41 hours of power reserve. It carries no date, which is what clears the space for the open heart. No battery, ever.\u003c\/p\u003e\n\n\u003cp\u003eAround it: a sapphire crystal that shrugs off keys and door frames, and a blue dial opened at the front so the mechanism is something you look at rather than something you take on trust.\u003c\/p\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMovement\u003c\/td\u003e\n\u003ctd\u003eSeiko NH38 automatic, open heart, no date, 21,600 bph, approx. 41-hour power reserve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDial\u003c\/td\u003e\n\u003ctd\u003eBlue, open heart aperture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBezel\u003c\/td\u003e\n\u003ctd\u003eSilver tone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBracelet\u003c\/td\u003e\n\u003ctd\u003eMetal link\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrystal\u003c\/td\u003e\n\u003ctd\u003eSapphire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater rating\u003c\/td\u003e\n\u003ctd\u003e5 ATM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat this price actually buys\u003c\/h2\u003e\n\n\u003cp\u003eThe watch this design echoes sells for hundreds of times this price, and a routine service on it costs more than this entire watch. Here, one price buys the whole thing: a genuine Seiko automatic under sapphire, built to order for you and regulated by hand. Nobody needs to know what it cost. That part is yours.\u003c\/p\u003e\n\n\u003cp\u003eOrder yours and start your build. You will get photos of your finished watch before it ships. Then you will get the watch.\u003c\/p\u003e","brand":"Rosevari Watches","offers":[{"title":"Default Title","offer_id":41935092023362,"sku":"RV-NAUT-OHROYAL","price":349.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/5107\/4882\/files\/nautilo-mod-open-heart-royal-blue.png?v=1786277954"},{"product_id":"seikoak-rg-skeleton","title":"Royal Oak (Rose Gold Skeleton) | NH38 Custom Mod Watch","description":"\u003cp\u003eA window straight into the movement.\u003c\/p\u003e\n\n\u003cp\u003eThe black dial is cut open at the centre so you can watch the balance wheel swing, back and forth, several times a second, all day, every day. Open heart is the term for it, and it is the one complication that makes people who care nothing about watches pick yours up and stare at it.\u003c\/p\u003e\n\n\u003cp\u003eAround the opening: an octagonal bezel and a steel bracelet leaving the case with no seam between them. Black is the right dial for this, because the moving parts read as bright metal against it and your eye goes exactly where the watch wants it to go. It is the sort of detail people notice slowly, then keep noticing.\u003c\/p\u003e\n\n\u003ch2\u003eAn open heart you can watch work\u003c\/h2\u003e\n\n\u003cp\u003eUnderneath is the Seiko NH38 automatic, the open heart calibre: 21,600 beats per hour, hacking seconds, hand-winding, and around 41 hours of power reserve. No date, because nothing is allowed to crowd the opening. No battery, ever.\u003c\/p\u003e\n\n\u003cp\u003eA sapphire crystal covers the case and shrugs off keys and door frames, and here it is doing double duty. It protects the watch and it is the lens you look through to see the mechanism running.\u003c\/p\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMovement\u003c\/td\u003e\n\u003ctd\u003eSeiko NH38 automatic, open heart, 21,600 bph, approx. 41-hour power reserve, no date\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDial\u003c\/td\u003e\n\u003ctd\u003eBlack, open heart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBezel\u003c\/td\u003e\n\u003ctd\u003eOctagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBracelet\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrystal\u003c\/td\u003e\n\u003ctd\u003eSapphire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater rating\u003c\/td\u003e\n\u003ctd\u003e5 ATM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat this price actually buys\u003c\/h2\u003e\n\n\u003cp\u003eThe watch this design echoes sells for hundreds of times this price, and a routine service on it costs more than this entire watch. Here, one price buys the whole thing: a genuine Seiko automatic under sapphire, built to order for you and regulated by hand. Nobody needs to know what it cost. That part is yours.\u003c\/p\u003e\n\n\u003cp\u003eOrder yours and start your build. You will get photos of your finished watch before it ships. Then you will get the watch.\u003c\/p\u003e\n","brand":"Rosevari Watches","offers":[{"title":"Default Title","offer_id":44697978372162,"sku":"RV-OAK-RGSKELETON","price":349.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/5107\/4882\/files\/seikoak-rg-skeleton.png?v=1786276089"},{"product_id":"nautilo-mod-black-open-heart","title":"Nautilus (Black Open Heart) | NH38 Custom Mod Watch","description":"\u003cp\u003e\u003cstrong\u003eThe porthole classic in its most serious colour, engine on display. A$349.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBlack horizontally embossed dial with baton markers, integrated octagonal bezel, stainless steel case and bracelet.\u003c\/strong\u003e The embossing runs in fine horizontal lines across the black dial, so the face reads flat from a distance and comes alive the moment light rakes across it. Through the open window the balance wheel keeps its own rhythm, a small mechanical heartbeat under a dark surface. This is the version you wear with a white cuff and let people lean in. It sits as comfortably over dinner as it does across a Monday of meetings, and the integrated bracelet keeps the whole profile low and clean on the wrist.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMovement:\u003c\/strong\u003e Seiko NH38 automatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase:\u003c\/strong\u003e 41mm stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystal:\u003c\/strong\u003e Sapphire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial \u0026amp; bezel:\u003c\/strong\u003e Black horizontally embossed dial with baton markers, integrated octagonal bezel, stainless steel case and bracelet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrap:\u003c\/strong\u003e Steel bracelet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater resistance:\u003c\/strong\u003e Everyday wear (splash-resistant, not dive-rated)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe movement\u003c\/h3\u003e\u003cp\u003eThe window is honest. Behind it sits a genuine Seiko NH38 automatic, wound by the motion of your arm, with no battery anywhere in the case. What you see moving is what keeps the time.\u003c\/p\u003e\n\u003ch3\u003eWhat you get from me\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBefore it ships, I photograph your watch and send it to you.\u003c\/strong\u003e Not a stock photo of the model. The actual one going in your box.\u003c\/p\u003e\n\u003cp\u003eIf it turns up faulty, damaged in transit or not the watch you ordered, email me your order number and a photo and I will repair it, replace it or refund it, postage on me both ways. After that, the 1-year warranty covers the movement, crystal, case and dial.\u003c\/p\u003e\n\u003ch3\u003eMade to order\u003c\/h3\u003e\n\u003cp\u003eYour watch does not exist yet. It is built for you, which takes 2 to 4 weeks before it ships. Because I build it to the spec you choose, I cannot take it back just because you changed your mind, so ask me anything before you order and I will tell you straight.\u003c\/p\u003e\n\u003ch3\u003eReady?\u003c\/h3\u003e\n\u003cp\u003eAdd it to your cart and I will get it started.\u003c\/p\u003e","brand":"Rosevari Watches","offers":[{"title":"Default Title","offer_id":44697980895298,"sku":"RV-NAUT-BLACKOPENHEA","price":349.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/5107\/4882\/files\/nautilo-mod-black-open-heart.png?v=1786275657"},{"product_id":"nautilo-mod-white-open-heart","title":"Nautilus (White Open Heart) | NH38 Custom Mod Watch","description":"\u003cp\u003e\u003cstrong\u003eThe porthole classic gone cool and pale, with the mechanics in open view. A$349.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIce blue horizontally embossed dial with baton markers, integrated octagonal bezel, stainless steel case and bracelet.\u003c\/strong\u003e Ice blue is a daylight colour. The horizontal embossing picks up whatever is around it, so the dial drifts between silvery and softly blue as you move through the day, and the open aperture gives you a glimpse of the balance swinging beneath the frost. Wear it with linen in summer, with a grey knit in winter, on the wrist that wants something lighter than every black dial in the drawer. The bracelet flows straight out of the case, one unbroken line of steel.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMovement:\u003c\/strong\u003e Seiko NH38 automatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase:\u003c\/strong\u003e 41mm stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystal:\u003c\/strong\u003e Sapphire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial \u0026amp; bezel:\u003c\/strong\u003e Ice blue horizontally embossed dial with baton markers, integrated octagonal bezel, stainless steel case and bracelet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrap:\u003c\/strong\u003e Steel bracelet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater resistance:\u003c\/strong\u003e Everyday wear (splash-resistant, not dive-rated)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe movement\u003c\/h3\u003e\u003cp\u003eBeneath the aperture runs a genuine Seiko NH38 automatic. It winds itself off your wrist, needs no battery, and puts its working parts exactly where you can watch them.\u003c\/p\u003e\n\u003ch3\u003eWhat you get from me\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBefore it ships, I photograph your watch and send it to you.\u003c\/strong\u003e Not a stock photo of the model. The actual one going in your box.\u003c\/p\u003e\n\u003cp\u003eIf it turns up faulty, damaged in transit or not the watch you ordered, email me your order number and a photo and I will repair it, replace it or refund it, postage on me both ways. After that, the 1-year warranty covers the movement, crystal, case and dial.\u003c\/p\u003e\n\u003ch3\u003eMade to order\u003c\/h3\u003e\n\u003cp\u003eYour watch does not exist yet. It is built for you, which takes 2 to 4 weeks before it ships. Because I build it to the spec you choose, I cannot take it back just because you changed your mind, so ask me anything before you order and I will tell you straight.\u003c\/p\u003e\n\u003ch3\u003eReady?\u003c\/h3\u003e\n\u003cp\u003eAdd it to your cart and I will get it started.\u003c\/p\u003e","brand":"Rosevari Watches","offers":[{"title":"Default Title","offer_id":44697983090754,"sku":"RV-NAUT-WHITEOPENHEA","price":349.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/5107\/4882\/files\/nautilo-mod-white-open-heart.png?v=1786275729"},{"product_id":"nautilo-mod-open-heart-tiffany-blue","title":"Nautilus (Open Heart Tiffany Blue) | NH38 Custom Mod Watch","description":"\u003cp\u003e\u003cstrong\u003eThe porthole classic, without the five-figure waiting list. A$349.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTurquoise horizontally embossed dial with baton markers, integrated octagonal bezel, stainless steel case and bracelet.\u003c\/strong\u003e Most watches at this price spend the money on the logo. We spend it on the watch: a genuine Japanese movement, a sapphire crystal and 316L marine-grade steel. Every part named, nothing dressed up. Every watch inspected before dispatch.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMovement:\u003c\/strong\u003e Seiko NH38 automatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase:\u003c\/strong\u003e 41mm stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystal:\u003c\/strong\u003e Sapphire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial \u0026amp; bezel:\u003c\/strong\u003e Turquoise horizontally embossed dial with baton markers, integrated octagonal bezel, stainless steel case and bracelet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrap:\u003c\/strong\u003e Steel bracelet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater resistance:\u003c\/strong\u003e Everyday wear (splash-resistant, not dive-rated)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe movement\u003c\/h3\u003e\u003cp\u003eInside is a genuine Seiko NH38 automatic with an open dial that shows the movement working. No battery, no pretending: the mechanics are the display.\u003c\/p\u003e","brand":"Rosevari Watches","offers":[{"title":"Default Title","offer_id":44697992527938,"sku":"RV-NAUT-OPENHEARTTIF","price":349.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/5107\/4882\/files\/nautilo-mod-open-heart-tiffany-blue.png?v=1786275700"}],"url":"https:\/\/seikomods.com.au\/collections\/open-heart.oembed","provider":"Rosevari Watches","version":"1.0","type":"link"}