IWC Antimagnetic Calatrava, stainless steel snap back case measures 30,5mm. Powered by the Caliber 83, from the early 1930's. Nice quality dress watch with an amazing looks from a legendary brand. Very early in the production of Cal. 83's it has a very awesome dial with arabic numerals and blue steel hands. The watch is surprisingly wearable for its size. Overall in very good and proper working conditions, it comes with a s/s bamboo bracelet.