I'm not an expert but I have researched his signature and in his early years he signed more like your example, his name was actually legible. In his later years he changed his signature to a style that was more difficult to make out his name, I have inluded the differences below. Your example definitely looks like it was signed during his early years, possibly while he was with the New York Giants sometime in the 50's. Sorry I can't be of more help.
Answers
I'm not an expert but I have researched his signature and in his early years he signed more like your example, his name was actually legible. In his later years he changed his signature to a style that was more difficult to make out his name, I have inluded the differences below. Your example definitely looks like it was signed during his early years, possibly while he was with the New York Giants sometime in the 50's. Sorry I can't be of more help.
Early years:
Later years autograph:
I'd say 1952/53 era
IMF
Thanks you both for your input.
You're welcome. 👍
Here's one I bought from him in 1993.