1962 spring training with Mickey Mantle signing autos for the youngsters. It has a really interesting note in Spanish on the back. Translated it reads:
Vicky,
This is the horse Mantle before the game, here at Pompano field.
Pompano Beach
2/18/1962
I'm guessing it's a term of endearment of sorts calling him a hardworker/fast runner. Or maybe they meant caballero which would be gentleman.