Found this two in a box of other crows. There is more Omega but they are so small. Probably for a ladys watch.
The left is 5,4 mm and the other 4,7. Domed ones. They are not new? But if they are rare? Any value?
Have some goldplated ones to? Smaller in dia and only dustproof.

 

I'm going to vote not really rare, and not much value. While not a crown expert, these look worn, small, and likely not for the more desirable /collected models, where a clean crown could be quite in demand.

 

S/S not that rare as you can still get from Parts suppliers. In demand are the older gold filled/capped crowns.

Sold mine and bought an iPad years ago with the money

DON