I checked literally hundreds of B&W and color. The color was a mix of transparencies and negatives and all were 4x5 taken over nearly 50 years.

All I found was Kodak film! Fancy that!

Anyhow, all color had an edgemarking of some sort. B&W was mixed, for example Super XX from 1960 or thereabouts all had edgemarking, bu samples from about 1978 or later did not. The marking included Kodak Safety Film and a product code.. Some had K*ODAK on the edge indicating some change in the property.

So, I would have to say that edgmarking varies quite a bit. I had some Agfa, Sakura and Fuji here but I was too lazy to keep looking.

PE