When I saw the original post of Artemisbeard's 1940's OK brand "Rudy York" base mitt, I thought it was pretty cool looking. The extended pocket feature is what grabbed me. I had my eye out for one ever since and recently found this near mint example. The palm is stamped "Special Palm Pocket" "Mastermade" and model UM. The "keyhole" shaped sewn leather on the face is interesting. I'm not sure of its purpose but it is distinctive.