{"product_id":"open-heart-automatic-watch-for-men-40mm-smith-watches","title":"Men's Automatic Watch | 40 mm Open-Heart | Stainless Steel Bracelet | Self-Winding Mechanical","description":"\u003cp\u003eThe \u003cstrong\u003eMen's Open-Heart Automatic Watch\u003c\/strong\u003e from Smith Watches is a 40 mm mechanical timepiece with a cut-out dial at 9 o'clock that exposes the beating balance wheel, a 316L stainless steel case, and a stainless steel bracelet. Self-winding automatic movement, approx. 40-hour power reserve, 3 ATM water-resistant, 2-year warranty.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is an open-heart watch?\u003c\/h3\u003e\n\u003cp\u003eAn open-heart watch is a mechanical watch with a small cut-out in the dial that exposes the balance wheel — the oscillating part of the movement that gives a mechanical watch its rhythm. Unlike a full skeleton, the rest of the face stays intact, keeping the time legible. Our opening is at 9 o'clock, a classic mid-20th-century layout.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the automatic movement work?\u003c\/h3\u003e\n\u003cp\u003eInside the watch, a rotor spins freely on the motion of your wrist. As it spins, it winds the mainspring, which powers the gear train and the balance wheel. No battery, no manual winding required when worn daily. Power reserve is approximately 40 hours off the wrist.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-heart dial cut-out\u003c\/strong\u003e at 9 o'clock, exposing the oscillating balance wheel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic self-winding movement\u003c\/strong\u003e, approx. 40-hour power reserve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40 mm 316L stainless steel case\u003c\/strong\u003e, versatile diameter for dress and casual.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhibition case back\u003c\/strong\u003e showing the full movement and rotor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour colour combinations\u003c\/strong\u003e: silver\/black, gold\/black, gold\/white, silver\/white.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScratch-resistant mineral crystal\u003c\/strong\u003e, front and back.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless steel bracelet\u003c\/strong\u003e with deployant clasp, 20 mm lug width.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater resistance: 3 ATM\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase diameter:\u003c\/strong\u003e 40 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase thickness:\u003c\/strong\u003e 12 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase material:\u003c\/strong\u003e 316L stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial:\u003c\/strong\u003e Open-heart at 9 o'clock (black or white)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMovement:\u003c\/strong\u003e Automatic, self-winding, approx. 40-hour power reserve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystal:\u003c\/strong\u003e Mineral, front and back\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBracelet:\u003c\/strong\u003e Stainless steel, 20 mm lug width\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater resistance:\u003c\/strong\u003e 3 ATM (30 metres)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2 years, international\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho is this watch for?\u003c\/h3\u003e\n\u003cp\u003eA first mechanical watch for men moving up from quartz, or a second watch for collectors who want a 40 mm automatic. The balance-wheel cut-out is a conversation piece without being flashy. The 40 mm case is the safest size for most wrists (6\"–8.5\").\u003c\/p\u003e\n\n\u003ch3\u003eWhat's included in the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOne Men's Open-Heart Automatic Watch 40mm Stainless Steel\u003c\/li\u003e\n\u003cli\u003eSmith Watches gift box\u003c\/li\u003e\n\u003cli\u003eOwner's guide\u003c\/li\u003e\n\u003cli\u003e2-year international warranty card\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003ch4\u003eDo automatic watches need batteries?\u003c\/h4\u003e\n\u003cp\u003eNo. Automatic movements are wound by wrist motion. Worn daily, they stay running continuously. If unworn for more than about 40 hours, the watch will stop and can be restarted by shaking or winding the crown manually.\u003c\/p\u003e\n\u003ch4\u003eHow is the accuracy compared to a quartz watch?\u003c\/h4\u003e\n\u003cp\u003eMechanical movements typically run within -20 to +40 seconds per day. Quartz is more accurate, but mechanical watches have character — you feel the oscillation and can watch the balance wheel work.\u003c\/p\u003e\n\u003ch4\u003eWill it fit a smaller wrist?\u003c\/h4\u003e\n\u003cp\u003eAt 40 mm, yes. The most versatile diameter, suits wrists from 6\" to 8.5\". If you usually wear 38–42 mm watches, this will feel right.\u003c\/p\u003e\n\u003ch4\u003eCan I see the movement through the back?\u003c\/h4\u003e\n\u003cp\u003eYes. The case back is a clear mineral crystal showing the full automatic movement and the rotor in motion. This is called an exhibition case back, standard on mechanical watches.\u003c\/p\u003e\n\u003ch4\u003eIs the steel bracelet sized to my wrist?\u003c\/h4\u003e\n\u003cp\u003eThe bracelet ships at full factory length to fit wrists up to 8.5\". For smaller wrists, any local jeweller can remove links in a few minutes for a small fee ($5–$15).\u003c\/p\u003e\n\n\u003ch3\u003eShipping, warranty, and returns\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFree tracked shipping\u003c\/strong\u003e on every order, no minimum spend.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFulfillment and delivery\u003c\/strong\u003e Orders are fulfilled from our United States warehouse in Torrance, California. Orders are typically processed within 2-3 business days, and total delivery is usually 7-15 business days depending on destination.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2-year Smith warranty\u003c\/strong\u003e covering movement and manufacturing defects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e30-day returns\u003c\/strong\u003e for eligible unused items. Return shipping is covered for defective, damaged, or incorrect items.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomer support\u003c\/strong\u003e at \u003ca href=\"mailto:support@smith-official.com\"\u003esupport@smith-official.com\u003c\/a\u003e. We reply within one business day.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"legal-pointer\"\u003e\u003cem\u003eFor company information and legal details, see our \u003ca href=\"\/pages\/imprint\"\u003eImprint \u0026amp; Legal\u003c\/a\u003e page.\u003c\/em\u003e\u003c\/p\u003e","brand":"Smith Watches","offers":[{"title":"Silver Black","offer_id":52030153883985,"sku":"SW-SWOH-001","price":279.95,"currency_code":"USD","in_stock":true},{"title":"Gold Black","offer_id":52030153916753,"sku":"SW-SWOH-002","price":279.95,"currency_code":"USD","in_stock":true},{"title":"Gold White","offer_id":52030153949521,"sku":"SW-SWOH-003","price":279.95,"currency_code":"USD","in_stock":true},{"title":"Silver White","offer_id":52030153982289,"sku":"SW-SWOH-004","price":279.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/1408\/5201\/files\/dress_silver_black_hero.png?v=1776268279","url":"https:\/\/smith-official.com\/products\/open-heart-automatic-watch-for-men-40mm-smith-watches","provider":"Smith Watches","version":"1.0","type":"link"}