{"product_id":"3940j-first-series-perpetual-calendar-yellow-gold-1","title":"3940J, First Series, Perpetual Calendar, Yellow Gold","description":"\u003cp\u003eA First Series ref. 3940J, one of fewer than 1000 examples. Featuring a 'Type A' Stern configuration with stepped subdials, this early example still employed many manual dial-making techniques such as manually finished apertures and applied indices. Just 8mm thanks to the revolutionary micro-rotor calibre 240 Q, the 3940 has defined the design of the perpetual calendar as a complication since. This example includes the rarely seen and early ellipse-style deployant clasp alongside its full set, with hallmarks preserved at 9. \u003c\/p\u003e","brand":"Hairspring","offers":[{"title":"Default Title","offer_id":59975800455249,"sku":null,"price":200000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/0830\/4465\/files\/Patek_Philippe-3940-First-Series-51.jpg?v=1786404128","url":"https:\/\/hairspring.com\/products\/3940j-first-series-perpetual-calendar-yellow-gold-1","provider":"Hairspring","version":"1.0","type":"link"}