I have one that looks identical to yours in shape. On the bottom at the top it says "Carter's", in the middle the number 31, and below that is says Carter.
Unfortunately I do not have any paper work on it, I was told it came from a collection from Montana, was supposely dug up at an old camp of Sitting Bull's in the early 1940's. I got it from a collector I knew for a long time.......Nice story, but no way to prove it......I know it is old....