Help with Mantle photo/back stamp
 

Anyone recognize the stamping on the back of this photo? Was it some sort of giveaway? P.R. photo? I bought a small lot of signatures and photos in an auction and there are a few of these with the same stamping (Maris, Tresh, Howard, Dimaggio and Kubek). Also in the lot were some 1960 UPI Telephoto photos from the Yankees/Pirates World Series, so I suspect (hope) these are from around the same time. Any help would be much appreciated. Thanks. Rob

Attachment 204266

Attachment 204267

Yankees team issued photo. Vintage to mid 1960's.

Thanks, Rhys! Looking forward to your next auction. I've been short on fundage the past couple. :)