Vintage 1956 IWC cal. 852 Jumbo Platinum / Iridium JDM Isomura Case Automatic Calatrava Style

1955 IWC Platinum cal. 852 Video: Selling this beautiful vintage IWC piece with solid platinum case and caliber 852 automatic movement. The interesting thing about the case, other than platinum generally being the rarest precious metal used in watches, is that during this time period import duties in Japan were very high on platinum. So IWC contracted with their distributor in Japan, Isomura, to manufacture the case and shipped the incomplete watches to Japan for final asse...