IWC Ingenieur SL Midsize Skinny, ref. 3506 - Switzerland, c. 1989 - Automatic[...] | lot 140 | Montres Vintage at Auctionata Paddle8 AG | Auction.fr | English
Loupe This: 34mm Genta IWC Ingenieur SL hotness for the wrist
IWC Ingenieur Sl Automatic 3506 / MM Pattern for $4,432 for sale from a Trusted Seller on Chrono24
WTS: IWC Ingenieur 3506 Full Kit - Rolex Forums - Rolex Watch Forum
IWC INGENIEUR REF 3506 STEEL International Watch Co., Schaffhausen, " Ingenieur Automatic'', case No. 2388290, Ref. 3506. Made circa 1988. Fine and very rare, tonneau-shaped, center-seconds, self- winding, water-resistant, antimagnetic, stainless steel ...