Is Jackie Robinson Autograph Legit, or a Clubhouse Signature? : r/Autographs

This example is also notable for the absence of any clubhouse signatures, which are quite common for 1950s Dodgers team balls. ALL the signatures

1955 Brooklyn Dodgers W.S. Champs Team Signed Baseball Jackie Robinson JSA COA

Two Clubhouse Signed Brooklyn Dodgers baseballs. One has three

Antiques: Baseball needs right umpire to assess value