For all purposes, appears to be a "Regency" model in dial, hands, and case. However, it has a 10BPAC 23-jewel movement where the Regency is advertised as a 17-jewel. Not original strap. L6 date code. No markings other than a recent service mark and a faint stamped BULOVA inside the case back. Case back exterior markings - BULOVA | 14KT GOLD | SHOCK RESISTANT | B511908 L6 | ANTI-MAGNETIC | SELF WINDING | * WATER PROOF *. No serial# or date code on movement itself. Yellow gold case. Signed crown. Unknown if this was "Frankenwatched" with a Regency case/dial and a movement out of a "23". There are no Regencies in the MyBulova database to compare to.
Thank you for posting your watch. This is a 1956 Bulova Cavalier according to this linebook listing and like watches we have documented on the site.

The Cavalier seems a good match.
Everything lines up with the linebook description.
1956 Bulova Cavalier
Loving the solid 14K gold case.
Any thoughts/insight as to the mismatch in movement specs? All of the models I've seen with this dial or similar have catalog specs of 17-jewel movements, not 23. The 10BPAC seems out of place.
In reply to Any thoughts/insight as to… by robatsgh
I missed the jewel count but still believe it is a Cavalier based on the case and dial. It is possible the movement has been replaced.
1956 Bulova Cavalier noting possible movement replacement