Kodak test films from both the plant and KRL were clearly marked with the coating number and process. All test films that I ever saw were in black cannisters and the test numbers began with FE, FW or had a J in the first two characters.
Is there anything on the other side?
This might have been something sent to an editor of a magazine or something like that. Gee, maybe you have one of the Kodachrome 400 t-grain coating tests. Muahahaha.
BTW, I don't troll.
PE