1929 Kashin R316: any examples of back stamps?

[Leon]

Originally Posted by PowderedH2O

Any reason why Kashin got an "R" designation in the catalog? It doesn't appear to be a product that had gum involved, at least not from the containers that have been shown in the photos.

He probably thought they were from (or associated with) an early candy or gum series or he made a mistake. He will always be the Grandfather of the Hobby but he was still
human.

edited to add a tidbit, in his ACC he did say, under the R designation,

SPORTS ISSUES
Most of the R305 - R318 sets are anonymous

That gives us a clue, without further research, he was unaware of where they came from. In his last version of the ACC ( I will have to check the previous ones) he didn't use the name "Kashin" only "Portraits in Action" ...."3 1/2 x 4 1/2"... black and white. .