My father did the initiation about the same time. We have photos and description in letters, but the certificate has been lost. USS Mississippi (BB-41), New Mexico-class battleship.
May God bless them all wherever they are. They were so much better than what we have now.
My fifth grade social studies teacher was on the New Mexico pre-Pearl Harbor and would tall about the attack and war. He mentioned the Shellback and Neptune ceremony in terms for fifth graders in the 1970’s. His last name was Tribel.