Others in here are more knowledgeable than I on Revue movements, but cal 56 I believe was launched in the (late?) 1930s. So definitely not a WWI watch IMO.
I don’t know anything about Revue serials or movements but this looks like a silver dial— so I thought pretty much the same as you as a result. If it were WWI or even 1920s I would have expected an enamel dial.