10 Nov IWC Schaffhausen oversized dress watch, Ref. 604, Circa 1966 Posted at 08:13h in Uncategorized by MoT2021 A wink to pink, in IWC style. Fluid lines and a great use of simplicity add sizzle to the larger 36mm diameter of this vintage dress model in 18k rose gold. The famous cal. 89 movement powering this wristwatch is considered as one of the most reliable watch mechanisms ever.