The first time I saw a S&D Tris Speaker Speed Model with good stampings, something clicked about the picture of Speaker on the heel---it seemed very familiar. I just had a quick look through some photos sources and found this Bain image from 1911, exactly the photo I was remembering when I saw the glove. It may or may not be an exact match---the extended arms and bat don't seem to be present on the glove---but the rest of the silhouette is close enough to make me wonder if it might have been the basis for the stamping dies.
The glove example comes from JD's site gallery. Apologies to the owner for lifting it for comparison.

Ray