I'm watching this piece on a local auction site and was considering bidding but thought I'd seek the collective wisdom and knowledge of OF beforehand.
I don't have a comprehensive Omega reference to turn to and know very little about these. I'm a fan of honeycomb/waffle dials and that's what attracted me to this in the first place. To me it looks like a nice honest example, decent case, nice even patina to the dial. Seller lists the movement as calibre 355 bump auto, and the case ref. 2757-6 SC. No photos of movement or inside case back have been provided. The unsigned crown caught my eye. Is this a replacement? Is there anything else of concern on this watch?

Thanks in advance for any knowledge that can be shared.

 

Yes, It does look like an honest watch and caliber 355 is correct for this case reference., Dial and hands are original and look nice. The crown is not original to the watch but it is an easy job to find a correct one.