This IWC Schaffhausen wristwatch dates to 1937, placing it among timepieces produced in the WWII era. Its construction is notable for a screw-back case, a detail that speaks to period engineering and a purposeful approach to case assembly. Powering the watch is the Cal. 83 movement, an example of IWC’s movement-making tradition from that time. For the modern collector, such a piece offers a direct link to pre-war manufacture and historical design language, complementing collections focused on early 20th-century horology and mechanically interesting movements.