I recently acquired a Joe DiMaggio snapshot image that is 3.25x4.25 inches. When I received the photo, it has a cardboard type texture to the photo and I was wondering if it's real or not. I'm still fairly new to collecting older photo. It has all the signs of it being real, I just don't know if it's possible to use a heavy stock/cardboard type film.If you think it's real, what time of camera would have been used to take the photo. Looks to be maybe 1937 at Comiskey Park.