Some time ago I bought a nice 1948 gold cased IWC dress watch which is original except for the crown. When comparing it to similar IWC dress watches from the same period I think the original crown is what I would describe as a "flattened onion" type.

Anybody have one of these crowns and is willing to part from one?

Diameter : 5.0mm
Tap 10 : 0.90mm
Case tube : 1,80mm
Tube inner : 1.40mm

Pics below are examples of the crown that I’m looking for

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