help with an old catchers mitt my grandpa gave me *PICS*

[yamsi12]

20 years ago my late grandpa gave me this catchers mitt. Anyone know anything about it. The only markings on it are two letters I cant make out on the back of the thumb area, then an apostrophe then an "S" then a few spaces, an "a" then a few more spaces and "Wilson". So i know the make but nothing else. Any info would be wonderful.

[crackofthebat]

The stampings on the back of the thumb says "It's a Wilson".

[yamsi12]

The stampings on the back of the thumb says "It's a Wilson".

thanks, do you have any idea how old it is?