I had a couple of the RR marbles back when I was a young lad. My friend Robert would find them by the tracks by his house (Wiemar, CA.). I'm going to shoot him this article, he may find some interest in the story behind them. Wonder if he still has his? I know mine were lost over time...
I know I've never actually seen them but they are much bigger than the average playing marble. I wonder how many marbles were made specifically for the use of moving crates out of the railroad cars?
It would seem kids woulda known bout them and went gathering them up in days past when kids [even men played marbles in the 19th century/early 20th century] played marbles...my generation were maybe the last to play marbles...JAMIE