Here's a nice one of Mantle circa 1967. He is wearing the DCT model base mitt of team mate Elston Howard. Note the "HOW" on the wrist strap. Besides catching, Howard spent time in the outfield and first base.
I would guess it's a Reach. A beautiful, mint glove. The D&M and VWD gloves had cloth patches more toward the middle of the wrist strap. A lot of joking around during spring training.
Love this thread. It made me want to go back through all my old cabinet photos. Found a couple more good ones. This catchers set made me think mine could be a catchers glove.