{"product_id":"nivada-grenchen-f77-mk2-38mm-open-heart-aventurine-dial-titanium-canvas-mens-automatic-watch-68051a77-bc","title":"Nivada Grenchen F77 MK2 38mm Open Heart Aventurine Dial Titanium Canvas Mens Automatic Watch 68051A77-BC","description":"\u003cp\u003eThe Nivada Grenchen F77 MK II Titanium Open Heart Green Aventurine 68051A77-BC is a Swiss-made automatic watch featuring a 38mm Grade 5 titanium case, a natural green aventurine dial and a black canvas Velcro strap. Its angular case combines vertically brushed surfaces with polished detailing, while the octagonal bezel is secured by eight screws. The dial features applied titanium-coloured indexes, luminous hands and an open-heart aperture at six o’clock that reveals the movement’s balance wheel. With a 46.2mm lug-to-lug measurement and a thickness of 11.60mm with the exhibition caseback, the watch pairs a distinctive stone dial with lightweight titanium construction. Water resistance is rated at 100 metres.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNatural Green Aventurine Dial and Open-Heart Display\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe natural green aventurine dial features a shimmering mineral surface with variations in colour and texture. Applied titanium-coloured indexes mark the hours, complemented by white Super-LumiNova dots around the dial perimeter. The matching hands contain white Super-LumiNova, while the embossed Nivada Grenchen logo and white printing provide contrast against the green background. At six o’clock, the open-heart aperture exposes the moving balance wheel, adding a mechanical focal point to the dial. The absence of a date display keeps attention on the stone surface and exposed movement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSoprod Automatic Movement and Mechanical Details\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003ePowering the F77 MK II is the Swiss Soprod M100BV automatic movement, operating at 28,800 vibrations per hour, or 4Hz. It features 25 jewels and a 42-hour power reserve, driving the central hour, minute and sweeping seconds hands. The exposed balance wheel provides a direct view of the movement’s operation through the dial, while the see-through flat sapphire caseback reveals the mechanism from the reverse. Together, these openings showcase the watch’s mechanical construction from both sides.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGrade 5 Titanium Case and Canvas Velcro Strap\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe 38mm case is crafted from Grade 5 titanium with vertically brushed and polished surfaces that emphasise its angular profile. Eight bezel screws frame the dial, while drilled lugs allow the strap to be changed. A double-domed sapphire crystal with anti-reflective coating protects the display. This version is fitted with a black canvas Velcro strap measuring 22mm at the case and tapering to 16mm, providing an alternative to the integrated titanium bracelet. The 46.2mm lug-to-lug measurement, 11.60mm thickness with the exhibition caseback and 100-metre water resistance complete a design that combines a natural stone dial with practical strap versatility.\u003c\/p\u003e","brand":"Nivada Grenchen","offers":[{"title":"Default Title","offer_id":55472519512405,"sku":"68051A77-BC","price":1810.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0951\/3720\/2517\/files\/image492293274.jpg?v=1792660895","url":"https:\/\/www.watchnation.com\/de\/products\/nivada-grenchen-f77-mk2-38mm-open-heart-aventurine-dial-titanium-canvas-mens-automatic-watch-68051a77-bc","provider":"WatchNation","version":"1.0","type":"link"}