There is no identification on the back of this small, standard sized photobooth photo. It came from the USA via Ebay, which makes me assume these are US Navy boys. I think it could come from pretty much any time from WW2, right up to the 1970s as this type of uniform seems to have changed little over that period. My one worry about designating the clothes US Navy kit, is that these collars do not have the stripes that are on all the other examples I can find online.