{"product_id":"fb-3spc-1-white-gold","title":"FB 3SPC.1, Chronomètre, White Gold","description":"\u003cp\u003eA FB 3SPC.1, Ferdinand Berthoud's chronometry-focused, \u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003ecylindrical hairspring time-only. \u003cmeta charset=\"UTF-8\"\u003eA flat hairspring breathes off-centre, pushing sideways on the balance pivots and shifting rate as amplitude falls. John Arnold's cylindrical spring, a marine-chronometer staple until about 1970, breathes concentrically, improving isochronism. This design was used across many of Berthoud's marine chronometers in period. \u003cmeta charset=\"UTF-8\"\u003eThis one has no tourbillon: both terminal curves are formed by hand and checked at 20x magnification, and adjustment took two years to perfect. The brand calls FB-SPC the first cylindrical-hairspring movement certified by COSC to the most stringent 3159 standard. Surfaces are fine-sandblasted matte with hand-polished bevels. Each movement holds over 100 hours of time in finishing, all by one skilled watchmaker. \u003cmeta charset=\"UTF-8\"\u003eWhile restrained and as proportionally svelte as possible, the FB 3SPC.1 fully displays Ferdinand Berthoud’s technical abilities in full measure. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Hairspring","offers":[{"title":"Default Title","offer_id":62743545053265,"sku":null,"price":210000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/0830\/4465\/files\/Ferdinand-Berthoud-3SPC.1-100.jpg?v=1791668088","url":"https:\/\/hairspring.com\/products\/fb-3spc-1-white-gold","provider":"Hairspring","version":"1.0","type":"link"}