I checked the reference number in a Google search and all the case backs are blank. They don't have that DeVille design engraved on the back
Also. Dials are simple in design. Stick indexes or Roman numerals and stick hands
These are what I found based off the reference number
You could have a watchmaker open it up and check to make sure all the information on the inside is correct, but if anything gets damaged. The seller could refuse to take it back.
The backside is what bothers me as it doesn't match the reference number