Learning About Film Codes

Some of these very old double 8 films have a code punched directly into the film at the beginning. Makes it easier to detect what it is and to develop it right!
Today I learned that IF is Agfa Isopan F (F stands for fine grain), black & white. From the 60s probably.

KM stands for Kodachrome K40, K II is … Kodachrome K II!