Approx. Ø50,5mm, steel case with British military identification, screwed, case and dial with the same military number 6422, case, work and dial, British military designation, housing and work number 676422, extremely rare IWC work calibre 71"fish tail" with fine regulation, original. Enamel dial (light crackle in the edge area), steel pointer, central second, functional. Only 600 were built in 1914 and 1917 and then in the 2nd century AD. World War II turned into the steel housing with the same number. Today they are considered the most coveted "Deck-Watches" of the 2. World War. Only very rarely does one of these rarities appear at auctions.