168.018 Omega Constellation strap/bracelet size

F foodietr

I opened the caseback and seems like the watch is a 168.018 with omega reference 564, @dsio

Also, since I was told the crystal is not original, I was looking at options to get an original crystal. I see there are two options - PX5112 (yellow ring), PZ5112 (white ring). Since this is a stainless steel watch with gold case/lugs, should I get the yellow or white one? I'm not entirely sure what the original crystal must have had. Ofrei has the white one (in screenshot below).

PX5112 with the yellow ring is available on ebay -
https://www.ebay.com/itm/1442339956...uid=2k1cchyHTwe&widget_ver=artemis&media=COPY

https://www.ebay.com/itm/2558122149...uid=2k1cchyHTwe&widget_ver=artemis&media=COPY

PZ5112 -
https://www.ofrei.com/page_168.html

Peemacgee

168.018 makes more sense - and now you mention it, the dial does look flat and the unusual indices are more likely on a later .018 watch.

You can also see the radial brushing on the bezel.

The advice about 19mm straps still holds.

As it is a gold capped watch a crystal with a gold retaining ring would be correct for your watch.

kaplan

For the buckle, just be vary of eBay, many many fake buckles, very rarely an original buckle, you need to buy a buckle after finding an 18-14 or 18-16 mm strap depending on the buckle size