Need help IDing mold

[Don 3]

Bought a bunch of stuff from a ladys whos husban passed, paid to much but have known this lady for 45 years and we went out in high school. Anyway the mold is a single cav., has no name, is for a 50 cal max.ball. All thats on it is "30910" and "50 cal". Just interested in who would make it, CVA, TC, ?

Thanks , Don

[versifier]

More info like a better physical description or better yet a photo would help a lot. It could be T/C, or Lyman, or ?