The information found on the case, is for the case, not the movement.

The information found on the movement, is for the movement, and that's what is needed to check any watch database.

"The watch also does not have the original band. Can replacement watch bands be purchased?"

If you are saying the band is not branded with the Omega manufacturing marks, then more than likely, just like the case, it was not actually manufactured by Omega, but outsourced by Omega.

To avoid import duties, watch movements were shipped to different countries, then cased by companies hired by Omega. The bands were probably purchased "off the shelf" and added.

You can check completed listings for value, this type of Omega is not on most collectors radar, but the 14K ones seem to sell, the more bling, the more money.

“As a general rule, if you want to get at the truth — hear both sides and believe neither.” Josh Billings

afantiques wrote:

If I were buying a watch I'd want one a bit less blurry.

af, you are one of the few people that I am aware of that has turned being cranky into an endearing trait.

The Omega Vintage Database is not a comprehensve reference for every model Omega ever produced.... far from it.  The place the Database is least complete is ladies' model and U.S.-market models.  Your case reference A-7604 is not in the database.

Your watch is indeed a U.S.-market watch as evidenced by the 14K gold case.  The Swiss market solid gold Omega watches used 18K gold cases, while 14K was primarily a U.S. standard.  The Swiss movement was imported into the U.S. by the Norman Morris Company (Omega's U.S. distribution agent at the time) and a U.S. manufactured gold case was fitted.

Judging by the case design, I would say the production year is early 1950s and the movement is likely a caliber 212.