Here are some writing samples from Dick Dobbins. (Sent to me by Larry Moe.) Dobbins was a big collector from the bay area. He wrote a couple of books about the pacific coast league and had a huge collection of pcl cards. He died in the early 1990’s. I think there are definitely some similarities between his handwriting and what is on the back of my R315... But it's not a slam dunk... Notice how Dobbins starts words that begin with "t" and notice how the "t" is written at the beginning of "team" on the R315.... Very similar... Other letters are similar as well....