I agree with Dave as to age and likely origins; I have items issued from several boxing publications. Whether to classify them as photos or premiums is the nit I have yet to competently pick. Here's a Tommy Gibbons from The Boxing Blade:
Here is one of those impossible to ID ones:
1969 from the New York Weekly Boxing News:
I'd definitely treat the Schmeling as an Everlast. The reason I am reluctant to characterize items without an Everlast logo as such is that they went to the trouble of adding art to the pics where art wasn't visible. Every one I have cataloged has an Everlast label somewhere...
Don't be fooled by the size. I've found the Everlast art images at various sizes from PC up to 8 x 10. I have some on my site in various sizes. Now, they could have been reprinted but until I have evidence of that I am OK with labeling them as Everlast pieces.
You got a deal regardless of what they are. For a buck a pop you can't go wrong. Every one is a HOFer. Heck, I'd give you two bucks each for them