Hey Paul what a piece!
I am not at all a fan of any Val.7750-powered model, and I sold my old battered Pasadena long ago.
Still yours with its immaculate PVD is a real beauty. Is the bracelet original? If so, is the clasp signed or not?
I agree these are underrated, even more than the 510.50x that remain my own favourite.

Cheers,
Fabrizio

PS On my wrist lately a NOS-like Omega Speedmaster Mark IV from 1973, wonderfully restored by Omega in Bienne. It's the first time I have put a non-Heuer watch on my wrist in the last year! Alas, no photos at hand to show...