I'm trying to identify this watch.
It says 14K Gold Filled D&A on the back, and was engraved 7-26-58.
I understand that D&A means the case was made by DiVincenzo and Arienti.
Inside the back case it says H-6280 below the Omega mark.
Below that number there is a six digit number beginning 558XXX.
The jeweler told me the movement number was 510 and there was another number 1475XXXX.
I'm not sure what any of these numbers mean.
The case seems to measure 33 mm, or 34 mm with the crown.
I hope someone out there can help educate me.