International Watch Co "IWC" Automatic Oval case - Mublot Swiss Special Steel strap attached. Special C.8541 Inhause caliber It works and keeps time without any problems. It looks perfect on the dial but has "unique vintage features". There are light patinas towards the edges. These patinas symbolize the shape of a truly vintage watch. The dial is original. Has machine number 1670403 It has the chassis number 1899573. Mica looks much better if it is lightly wiped. It has a huge case size of 35 x 40.5 mm. Bracelet length is adjustable, suitable up to 20 cm. It is one of the most prominent watches of the period. I hope it passes to a real collector..