I'm interested in buying a Quartz Omega Deville, currently at auction, from around the 1970's - 1980's. However the reverse of the case there is some engraving. It isn't the end of the universal, but ideally I'd like to replace it .
I'm wondering if anyone know where I could find a spare for sale and the approximately price. For reference the size without crown is 34mm.

Many thanks,
Robert

 

Otto Frei would be your best bet. But you need the model number to find anything. Honestly, the case back would probably cost more than the watch is worth. Can I ask why you are looking at a Quartz?