Originally Posted by
walkerwek1958
I don’t believe the watch is late 70s, it’s a C case design and they were popular from approx 1967 to 1975, I own a couple of Omega C case Constellations so I’m familiar with the design.
If the bracelet currently fitted isn’t original to the watch, why try to find something similar? Simple answer is to put the watch on a nice padded strap and enjoy it !
I’m almost detain a bracelet option would be offered from new, with fitted end pieces, but the chances if finding the right one on useable condition is virtually nil. It will be possible to source a decent quality generic bracelet and possibly modify some end pieces to fit the case, I did this recently with an old Seiko, but it’s a lot of hassle and messing about. If you get the case reference and do a bitog Google searching you might find a picture that shows the original design, but sometimes different bracelets were offered in different parts of the world so it isn't straightforward. Easiest option is an oyster-style with generic end pieces modified to fit the case.
Leather strap is the easiest option, I’ll bet a pound to penny the lug width is 19mm!