Good question; back is blank.
Seems to have the same image and type font/size. It could very well be the 1966 Yankees Team Issue.
Here is where I found the images/checklist:
https://www.tradingcarddb.com/Galler...-Yankees-Set-B
Edit: Guys that were not on the Yankees in 1966 in this "set": Berra, Stafford, Ralph Terry.
Edit: Looks like there is also a 5x7 version of the same set. So I'll have it sent to me and see how big it is.
Maybe the Yankees bought their photos from the Sports Service guy.