{"product_id":"citizen-collection-open-heart-nh9150-52l-mens-watch","title":"Citizen Collection Open Heart NH9150-52L Men's Watch","description":"\u003cp data-path-to-node=\"6\" id=\"p-rc_3d4351caef406622-181\"\u003e\u003cspan class=\"citation-559\"\u003eThe \u003c\/span\u003e\u003cspan class=\"citation-559\"\u003eCitizen NH9150-52L\u003c\/span\u003e\u003cspan class=\"citation-559\"\u003e (cataloged within the prestigious \u003c\/span\u003e\u003cspan class=\"citation-559\"\u003eCitizen Collection \/ Mechanical Open Heart Series\u003c\/span\u003e\u003cspan class=\"citation-559 citation-end-559\"\u003e) is an authoritative, high-performance Japanese automatic mechanical sport-dress timepiece.\u003csup class=\"superscript\" data-turn-source-index=\"1\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-558 citation-end-558\"\u003eEngineered for discerning horological enthusiasts who appreciate the living, exposed heartbeat of mechanical watchmaking paired with modern athletic wrist presence, this reference delivers a commanding, vibrant aesthetic in an all-stainless-steel construction.\u003csup class=\"superscript\" data-turn-source-index=\"2\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-557\"\u003eAcross international watch forums, Japanese Domestic Market (JDM) collector circles, and everyday carry (EDC) communities, it has earned defining community nicknames—the \u003c\/span\u003e\u003cspan class=\"citation-557\"\u003e\"Open Heart\"\u003c\/span\u003e\u003cspan class=\"citation-557\"\u003e, \u003c\/span\u003e\u003cspan class=\"citation-557\"\u003e\"Blue Open Heart\"\u003c\/span\u003e\u003cspan class=\"citation-557\"\u003e, \u003c\/span\u003e\u003cspan class=\"citation-557\"\u003e\"Steel Open Heart\"\u003c\/span\u003e\u003cspan class=\"citation-557\"\u003e, \u003c\/span\u003e\u003cspan class=\"citation-557\"\u003e\"Sporty Open Heart\"\u003c\/span\u003e\u003cspan class=\"citation-557\"\u003e, \u003c\/span\u003e\u003cspan class=\"citation-557\"\u003e\"Ocean Open Heart\"\u003c\/span\u003e\u003cspan class=\"citation-557\"\u003e, or \u003c\/span\u003e\u003cspan class=\"citation-557\"\u003e\"Mechanical Heart 41\"\u003c\/span\u003e\u003cspan class=\"citation-557 citation-end-557\"\u003e—for its prominent open-heart balance wheel aperture at 9 o'clock, radiant sunray deep blue dial plate, monochromatic brushed and polished stainless steel architecture, exhibition display caseback, and robust 100-meter water resistance rating.\u003csup class=\"superscript\" data-turn-source-index=\"3\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-556 citation-end-556\"\u003eIt unites a sculpted 316L solid stainless steel case in a versatile 41.0mm diameter with an evocative blue dial, faceted applied silver-tone indices, an in-house Japanese automatic mechanical caliber, durable crystal glass, and an integrated solid stainless steel construction.\u003csup class=\"superscript\" data-turn-source-index=\"4\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e Perfectly calibrated for corporate executives, creative leaders, and mechanical watch collectors seeking a dynamic, mechanically expressive daily timepiece that transitions effortlessly from formal boardroom meetings and tailored suits to celebratory dinners and active weekend travel. \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003eThe defining visual centerpiece of this NH9150-52L reference is its captivating open-heart dial architecture. Anchored at the 9 o'clock position is a circular skeletonized window framed in polished silver, offering an intimate, uninterrupted view of the beating balance wheel, hairspring, and pallet fork in continuous mechanical motion. \u003cspan class=\"citation-555 citation-end-555\"\u003eFinished in an ultra-fine sunburst radial brushing, the deep oceanic blue dial plate catches and refracts ambient light across dynamic azure-to-navy gradients, providing an intense, luminous stage for the exposed escapement.\u003csup class=\"superscript\" data-turn-source-index=\"5\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e Circling the outer perimeter is a stepped chapter ring marked with crisp white minute demarcations for down-to-the-second precision. \u003cspan class=\"citation-554 citation-end-554\"\u003eProminent three-dimensional, applied silver-tone faceted baton hour indices line the hour positions, diamond-cut and treated with high-performance luminescent compound to ensure effortless readability in low-light environments.\u003csup class=\"superscript\" data-turn-source-index=\"6\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e Broad silver-tone sword-style hour and minute hands sweep authoritatively across the dial alongside a needle-thin central sweep seconds hand. Framing the dial is a fixed solid stainless steel bezel with a slightly thickened profile and mirror-polished angled chamfer that accentuates the case’s athletic shoulders and downward-sloping lugs. \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003cspan class=\"citation-553\"\u003eBeneath its tailored exterior, the watch is driven by Citizen’s in-house \u003c\/span\u003e\u003cspan class=\"citation-553\"\u003eCalibre 8229\u003c\/span\u003e\u003cspan class=\"citation-553 citation-end-553\"\u003e Japanese automatic mechanical movement, engineered and manufactured at Citizen’s dedicated horological facilities in Japan.\u003csup class=\"superscript\" data-turn-source-index=\"7\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-552\"\u003eBeating at a steady frequency of 21,600 vibrations per hour (3 Hz), this 21-jewel self-winding caliber harnesses the natural kinetic motion of the wearer’s wrist to wind the mainspring, delivering approximately \u003c\/span\u003e\u003cspan class=\"citation-552\"\u003e40 to 42 hours of autonomous power reserve\u003c\/span\u003e\u003cspan class=\"citation-552 citation-end-552\"\u003e on a full wind.\u003csup class=\"superscript\" data-turn-source-index=\"8\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-551 citation-end-551\"\u003eIn addition to automatic rotor winding, the Calibre 8229 features convenient manual hand-winding capability through the crown, allowing the wearer to wind the movement smoothly after periods of rest.\u003csup class=\"superscript\" data-turn-source-index=\"9\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-550 citation-end-550\"\u003eThe caliber is equipped with a hacking seconds (stop-seconds) mechanism that halts the seconds hand when the crown is pulled out, enabling down-to-the-second time synchronization.\u003csup class=\"superscript\" data-turn-source-index=\"10\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-549\"\u003eBuilt with Citizen’s proven shock-resistant balance architecture and Japanese Industrial Standard (JIS) Class 1 anti-magnetic resistance (4,800 A\/m), the movement defends timekeeping precision against everyday magnetic fields from laptops and mobile devices, maintaining a reliable factory static tolerance of \u003c\/span\u003e\u003cspan class=\"citation-549\"\u003e-20 to +40 seconds per day\u003c\/span\u003e\u003cspan class=\"citation-549 citation-end-549\"\u003e.\u003csup class=\"superscript\" data-turn-source-index=\"11\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003cspan class=\"citation-548\"\u003eThe case is engineered with substantial, contemporary sports-dress proportions, measuring an official \u003c\/span\u003e\u003cspan class=\"citation-548\"\u003e41.0mm in case diameter\u003c\/span\u003e\u003cspan class=\"citation-548\"\u003e with a case profile thickness of \u003c\/span\u003e\u003cspan class=\"citation-548\"\u003e11.7mm\u003c\/span\u003e\u003cspan class=\"citation-548\"\u003e, an interhorn lug width of \u003c\/span\u003e\u003cspan class=\"citation-548\"\u003e22.0mm\u003c\/span\u003e\u003cspan class=\"citation-548\"\u003e, and a total weight of approximately \u003c\/span\u003e\u003cspan class=\"citation-548\"\u003e141.0 grams\u003c\/span\u003e\u003cspan class=\"citation-548 citation-end-548\"\u003e.\u003csup class=\"superscript\" data-turn-source-index=\"12\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e The watch sits exceptionally balanced on the wrist, offering a solid, reassuring heft that speaks to its all-metal construction and refined finishing. The solid 316L stainless steel case architecture combines vertical hairline satin brushing across the upper lug surfaces with mirror-polished flanks and beveled contours. \u003cspan class=\"citation-547\"\u003eDial protection is provided by a heavy-duty, impact-resistant flat \u003c\/span\u003e\u003cspan class=\"citation-547\"\u003emineral crystal glass\u003c\/span\u003e\u003cspan class=\"citation-547 citation-end-547\"\u003e.\u003csup class=\"superscript\" data-turn-source-index=\"13\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-546 citation-end-546\"\u003eThe reverse side features an exhibition see-through screw-down caseback that allows the wearer to view the mechanical movement, decorated oscillating rotor, and jewel pivots from behind.\u003csup class=\"superscript\" data-turn-source-index=\"14\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-545\"\u003eBuilt for dependable daily active resilience, the solid stainless steel case features an ergonomic fluted push-pull crown at 3 o'clock, securing a certified \u003c\/span\u003e\u003cspan class=\"citation-545\"\u003e10-bar (100 meters \/ 330 ft) water resistance rating\u003c\/span\u003e\u003cspan class=\"citation-545 citation-end-545\"\u003e, making it completely safe for swimming, snorkeling, water sports, and daily active wear.\u003csup class=\"superscript\" data-turn-source-index=\"15\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-544 citation-end-544\"\u003eThe timepiece comes completed on an integrated solid stainless steel multi-link construction featuring alternating satin-brushed and polished links, secured by a sturdy fold-over deployment clasp with dual push-button safety release.\u003csup class=\"superscript\" data-turn-source-index=\"16\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"MonaWatch","offers":[{"title":"Default Title","offer_id":67758902739258,"sku":"NH9150-52L","price":920.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/5858\/3354\/files\/NewProject_9c4922fd-1e65-4321-a276-9e3e01b91bf5.webp?v=1792648544","url":"https:\/\/www.monawatch.com\/products\/citizen-collection-open-heart-nh9150-52l-mens-watch","provider":"MonaWatch","version":"1.0","type":"link"}