IWC Ingenieur SL 1832

IWC

Manufacturer IWC Year 1980 Reference No 1832 Movement No 2’176’271 Case No 2’223’239 Model Name Ingenieur SL “Jumbo” Material Stainless steel Calibre Automatic, cal. 8541, 25 jewels Bracelet/Strap Stainless steel IWC bracelet stamped “04”, max length 220mm Clasp/Buckle Stainless steel IWC deployant clasp Dimensions 40mm diameter Signed Case, dial, movement, bracelet and clasp signed Accessories Accompanied by IWC fitted presentation box and service invoice. Delivered with IWC Extract from the Archives confirming the date of sale of the present timepiece on 31st August 1980 at IWC Frankfurt. Good To Know: First generation of the IWC Ingenieur SL Antimagnetic 8541 caliber Confirmed by the Extract from the Archives Nicknamed the “Jumbo” for its muscular 40mm diameter, the IWC Ingenieur SL (Steel Line / Sports Line) was in production from 1976 until 1984 with a remarkably limited output of approximately 543 pieces produced across stainless steel and two-tone combinations. Its distinctive dial boasts a captivating chequered waffle pattern that dances with light in a display of subtle, understated elegance—never flashy, always refined. At its heart lies the Pellaton self-winding calibre 8541ES, shielded by a soft iron Faraday cage that delivers exceptional antimagnetic protection up to 80,000 A/m (1,000 gauss)—a technical feat IWC pioneered back in 1955. This robust movement also incorporates a hacking seconds function for precise time-setting and a practical date complication. The present example is preserved in excellent overall condition, showcasing the sought-after first-generation bracelet with its distinctive center links featuring rounded corners—a detail later revised to wider, squared-off aesthetics for subsequent iterations.