I don't think it s a 1960. Here are two from 1960 that have a stripe across the uniform that isn't on yours.
A rookie jersey SCP auctioned in 2015 shows the stripe:
My head through the hoop one is newspaper archive dated to November 1960. It also matches a 1960 action shot I have of Wilt and Bill slugging it out. I will see if I can find a scan of that one.