A historically significant Tudor, this ref. 92400 is the first-ever automatic chronograph from any Wilsdorf manufacture (a good decade ahead of Rolex). Unlike the latter series, its case, crown, and bracelet are all Rolex signed. Additionally, the bakelite bezel on our example has no cracks and its subdials have started to turn champagne in tone. It comes from a German estate sale new to market after its original owner, a true time capsule specimen with receipt from original Wempe sale in 1979.