The tailpiece, headstock, and general body shape are very similar and maybe identical to an old Harmony archtop of mine (which has since been reworked to change the tailpiece and headstock). My guess is that my Harmony is late fifties or early sixties, and quite typical of guitars of that and previous times. Many brand names share components not to mention manufacturers, so it could be one of several different brands I suppose.

The picture is wonderful! What a moment in time!

Peace, Mooh.