Omega Constellation

[Clockwatching247]

Morning, Inhave just got this 1970s Omega -can anyone tell me anything about it?  The back appears to be missing the centre piece? It seems to be working fine and keeping excellent time

Can I get the glass replaced somewhere in the U.K.?

Many thanks 

[JohnR725]

I don't suppose you want to take the back off so we can see what's inside?

then if you ever do take the back off you want to be really careful as getting anything resembling replacement parts for this is almost impossible. They were made a huge quantity and they're just really difficult to get parts and they tend to be very expensive.

I also swiped an image off online the constellation back's are supposed to have that inside. Maybe somebody swiped it for the gold I didn't realize they came off?

Then for the crystal it looks like flat glass which means almost anybody could put that in but you don't want to trust that movement anybody as I said getting it fixed or dealing with problems with it will be a big issue. If you want the actual crystal number we would need the number off the inside of the case back as I don't see a serial number on the outside anywhere in your pictures

https://electric-watches.co.uk/makers/omega/omega-megasonic/