{"product_id":"gruen-precision-chronograph-770r","title":"Gruen Precision Chronograph 1970s","description":"\u003cp\u003e\u003cem\u003eA unique chronograph from a forgotten brand.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReference 770R\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Gruen Precision 770R chronograph dates from the turn of the 1970s, a pivotal period for this American house founded in Ohio: after the sale of the company in 1958 and its transfer to New York under new management, Gruen now assembled Swiss movements in cases positioned in an accessible rather than prestigious segment. This model features the Valjoux 7733 caliber, which originated from Venus's famous 188 caliber, a brand absorbed by Valjoux in 1966.\u003c\/p\u003e\n\u003cp\u003eWrist size in photo\/video: 17 cm\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCase\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eSteel\u003c\/li\u003e\n\n\u003cli\u003eDiameter 37 mm (excluding crown)\u003c\/li\u003e\n\n\u003cli\u003eFluted crown and round steel pushers, acrylic crystal\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMovement\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eValjoux 7733 caliber, manual winding\u003c\/li\u003e\n\n\u003cli\u003eBi-compax cam architecture: continuous seconds at 9 o'clock, 30-minute chronograph counter at 3 o'clock\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDial\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eDial turned ivory by patina\u003c\/li\u003e\n\n\u003cli\u003eApplied baton indexes, complemented by large Arabic numerals at 12 and 6 o'clock\u003c\/li\u003e\n\n\u003cli\u003eFaceted baton hands, slender chronograph sweep second hand\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWatch serviced in July 2026\u003c\/strong\u003e\u003c\/p\u003e","brand":"Gruen","offers":[{"title":"Default Title","offer_id":53669306106203,"sku":null,"price":3800.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0995\/7919\/9835\/files\/DSC02921.jpg?v=1785482683","url":"https:\/\/vintagewatchspirit.com\/es-eu\/products\/gruen-precision-chronograph-770r","provider":"Vintage Watch Spirit ","version":"1.0","type":"link"}