The 50s Omega’s a really nice example, I remember working on it. The Chronostop sounds excellent too.
I’ll drop you a PM giving my opinion on the 50s one, but I’d be guessing on the Chronostop. Clearly, it’s a good one, Rocco has a lapping machine and that’s the best (only) way to get the original finish 100% right.
Are you really sure you want to sell? Once they’re gone they’re hard to replace.
Edit: Just checked my records, the 50s Omega's guaranteed with me till the end of July, provided the watch stays on TZ I'm happy to transfer the guarantee.