Mystery Omega. Help with ID needed please

Hello Everyone

I found some Watches in my parents house and they seem to be from Omega and a watchmaker told me that they seem to be quite valuable. Does some one know this kind of watch, unfortunately I don't have more Information than these pictures. Google wasn't helpfull too...









Thanks for your effort.

Very nice, first watch looks like an early bumper movement, with Cal. 28.10.

2nd watch is beautiful...looks very much like the issued military chronographs, but this has no markings on the caseback.
You might need some of the experts to chime in here...

Agree on the first one, looks like a 2421 reference wirh bumper movement. @Alpha had one of those and @Tire-comedon I suppose has one?

The chronograph's beautiful, looks 1930s or 1940s given the shape of the crown and pushers. Interesting that it has a sterile dial.

Edit- crisp pictures of the movements and inside casebacks would help, as always. But that means getting the watchmaker to open them again. Do not try opening yourself, you would risk causing permanent damage.