I working on my dad's WWII photo album and have a number of small pictures that have two photos on one print. The prints are 2.5" x 3.5" so are not real big.It's a bit puzzling. I'm not not sure if he took the pictures or if he found someone selling them. I think they mark places he fought in, such as Aachn, Wesel etc. I've included a few for your review.
I would like to know if they are commercial or personal photos. If commercial where can I find some information on them like: is a viewable catalog available, when were they taken, etc. Examples are shown below
Any help wou