{"product_id":"iwc-ingenieur-on-gay-frere-bracelet-666ad","title":"IWC Ingenieur On Gay Frere Bracelet 666AD","description":"\u003cp data-start=\"0\" data-end=\"76\"\u003e\u003cstrong data-start=\"0\" data-end=\"76\"\u003eIWC Ingenieur 666AD – 1968 – 37mm – On SUPER Rare GF Flat Beads Bracelet\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"78\" data-end=\"137\"\u003eSome watches whisper quality.\u003cbr data-start=\"107\" data-end=\"110\"\u003eOthers radiate engineering.\u003c\/p\u003e\n\u003cp data-start=\"139\" data-end=\"179\"\u003eThis 1968 IWC Ingenieur 666AD does both.\u003c\/p\u003e\n\u003cp data-start=\"181\" data-end=\"466\"\u003eThe 666AD is the transitional Ingenieur — cleaner than the early references, yet still carrying that pure tool-watch DNA that made the line legendary. The 37mm stainless steel case gives it stronger wrist presence than most 60s watches, while remaining perfectly balanced and wearable.\u003c\/p\u003e\n\u003cp data-start=\"468\" data-end=\"498\"\u003eAnd then there’s the bracelet.\u003c\/p\u003e\n\u003cp data-start=\"500\" data-end=\"870\"\u003eFitted on an exceptionally rare \u003cstrong data-start=\"532\" data-end=\"566\"\u003eGay Frères flat beads bracelet\u003c\/strong\u003e — period correct and highly collectible. The flat beads construction gives the watch a technical, purposeful look and elevates it into a full vintage steel sports configuration. These bracelets are extremely difficult to source separately today — especially paired correctly to an Ingenieur of this era.\u003c\/p\u003e\n\u003cp data-start=\"872\" data-end=\"1105\"\u003eThe dial has aged beautifully, with crisp printing and clean applied markers. Inside beats the legendary Cal. 8541 with Pellaton winding system — one of IWC’s most respected and durable automatic movements, built to last generations.\u003c\/p\u003e\n\u003cp data-start=\"1107\" data-end=\"1172\"\u003eThis is not just an Ingenieur.\u003cbr data-start=\"1137\" data-end=\"1140\"\u003eThis is the right configuration.\u003c\/p\u003e\n\u003chr data-start=\"1174\" data-end=\"1177\"\u003e\n\u003ch3 data-start=\"1179\" data-end=\"1203\"\u003eTechnical Background\u003c\/h3\u003e\n\u003cp data-start=\"1205\" data-end=\"1461\"\u003eThe reference 666AD represents an important chapter in the Ingenieur lineage. Designed as an antimagnetic engineer’s watch, it features a soft iron inner cage to protect the movement from magnetic fields — a serious professional specification for its time.\u003c\/p\u003e\n\u003cp data-start=\"1463\" data-end=\"1660\"\u003eThe Caliber 8541 is part of IWC’s famed 85x family, featuring the Pellaton automatic winding system — a highly efficient and robust design that remains a benchmark in vintage automatic engineering.\u003c\/p\u003e\n\u003cp data-start=\"1662\" data-end=\"1836\"\u003eThe Gay Frères flat beads bracelet, produced by the legendary Swiss bracelet manufacturer, is a rare and highly desirable period accessory that completes the watch perfectly.\u003c\/p\u003e\n\u003chr data-start=\"1838\" data-end=\"1841\"\u003e\n\u003ch3 data-start=\"1843\" data-end=\"1857\"\u003eTech Sheet\u003c\/h3\u003e\n\u003cul data-start=\"1859\" data-end=\"2207\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-start=\"1859\" data-end=\"1879\"\u003e\n\u003cp data-start=\"1861\" data-end=\"1879\"\u003eReference: 666AD\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1880\" data-end=\"1894\"\u003e\n\u003cp data-start=\"1882\" data-end=\"1894\"\u003eYear: 1968\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1895\" data-end=\"1920\"\u003e\n\u003cp data-start=\"1897\" data-end=\"1920\"\u003eCase: Stainless steel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1921\" data-end=\"1935\"\u003e\n\u003cp data-start=\"1923\" data-end=\"1935\"\u003eSize: 37mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1936\" data-end=\"1992\"\u003e\n\u003cp data-start=\"1938\" data-end=\"1992\"\u003eMovement: IWC Cal. 8541 automatic (Pellaton winding)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1993\" data-end=\"2035\"\u003e\n\u003cp data-start=\"1995\" data-end=\"2035\"\u003eDial: Silver dial with applied markers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2036\" data-end=\"2054\"\u003e\n\u003cp data-start=\"2038\" data-end=\"2054\"\u003eCrystal: Plexi\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2055\" data-end=\"2074\"\u003e\n\u003cp data-start=\"2057\" data-end=\"2074\"\u003eLug width: 18mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2075\" data-end=\"2119\"\u003e\n\u003cp data-start=\"2077\" data-end=\"2119\"\u003eBracelet: Gay Frères flat beads bracelet\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2120\" data-end=\"2179\"\u003e\n\u003cp data-start=\"2122\" data-end=\"2179\"\u003eCondition: Excellent vintage condition with honest wear\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2180\" data-end=\"2207\" data-is-last-node=\"\"\u003e\n\u003cp data-start=\"2182\" data-end=\"2207\" data-is-last-node=\"\"\u003eWarranty: 2-year warranty\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Perpetual Watch Lover (PWL)","offers":[{"title":"Default Title","offer_id":53922930753865,"sku":"1742","price":4400.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0238\/6352\/5456\/files\/DSF9416_d942e7c7-0a22-4e34-9af2-b9fdb50789ff.jpg?v=1771945903","url":"https:\/\/perpetualwatchlover.com\/products\/iwc-ingenieur-on-gay-frere-bracelet-666ad","provider":"Perpetual Watch Lover (PWL)","version":"1.0","type":"link"}