They are from the Puerto Rican winter league, obviously. I am trying to nail down any information that I can on what year they are from, and I have to guess that the only way to do that is to figure out some of the players depicted.
I think that I see Quincy Trouppe on the Caguas postcard, but that doesn't help as I have no idea where to find rosters from the Puerto Rico winter league from the 1940's.
Any help would be greatly appreciated.
Tom C