![IWC REF. 3521 INGENIEUR PLATINUM ROTOR STEEL International Watch Co., Schaffhausen, "Ingenieur", Officially Certified Chronometer, Automatic, case No. 2603832, Ref. 3521. Made in the 1990s. Fine, tonneau-shaped, center seconds, self-winding, water ... IWC REF. 3521 INGENIEUR PLATINUM ROTOR STEEL International Watch Co., Schaffhausen, "Ingenieur", Officially Certified Chronometer, Automatic, case No. 2603832, Ref. 3521. Made in the 1990s. Fine, tonneau-shaped, center seconds, self-winding, water ...](https://antiquorum-swiss-assets.s3.us-west-2.amazonaws.com/images/279/lots/34/34.jpg)
IWC REF. 3521 INGENIEUR PLATINUM ROTOR STEEL International Watch Co., Schaffhausen, "Ingenieur", Officially Certified Chronometer, Automatic, case No. 2603832, Ref. 3521. Made in the 1990s. Fine, tonneau-shaped, center seconds, self-winding, water ...
![IWC Ingenieur with box and some papers IW 3521 for $8,858 for sale from a Trusted Seller on Chrono24 IWC Ingenieur with box and some papers IW 3521 for $8,858 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/27825550-ugowpzca3n1hz0fsn71qro8o-ExtraLarge.jpg)