Omega YG thin scalloped or decagonal crown

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Hello - I’m in need of a yellow gold plated crown to fit a railtrack Constellation. Either a thin scalloped or a thin decagonal should work, although the former is preferred. Only looking for original vintage ones with flat-foot Omega logos as the others can be easily found on eBay if it comes to that. Dimensions and photos are below.

Thin scalloped
Came on Seamasters and Constellations in the 60s (don’t know part number)
4.75mm diameter, 2mm thick, 2mm tube, tap 10 (0.9mm)


Thin decagonal
Came on Constellations in the 60s (part #4204)
5.2mm diameter, 2.2mm thick, 2mm tube, tap 10 (0.9mm)
 
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A seller I know may have one or two. He charges $250 for one. Are you ready to pay that price?
 
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No, but I have some RG and steel ones that I would consider offering for trade..?
Edited:
 
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Looking for the same crown, either a thin scalloped or a thin decagonal should work. Thanks.