Omega Gold Crown -- what Models was it used for ?

Posts
6
Likes
0
Photos attached, I've had it lying around for years and never seen one similar
any ideas or information very much appreciated ..many thanks --

 
Posts
1,521
Likes
4,781
A back winder I believe.
Usually found on Omega ladies cocktail type watches.
 
Posts
6
Likes
0
Thanks very much appreciated -- Its 5.5 mm Dia -- so perhaps a Ladies size