1997 Ken Griffey Jr. Seattle Mariners signed game worn helmet. This size 7 1/8 authentic Diamond Collection helmet was worn by Griffey during his 1997 MVP season. The dial inside reads "97" and the back padding of the helmet is loose. The Mariners "S" logo is on the front of the helmet, and there is a "24" decal on the back. The helmet shows heavy signs of use with scuff marks present all over the helmet. Griffey signed the bill of the helmet with a silver Sharpie.