Roberto Clemente Arco Gas Proof?
 

I don't have a whole lot of post war, but I do have what I believe is a Clemente proof from the Arco set. Mine measures 9.75" x 10" (sorry for the weird photo angle - it is too big for my scanner).

The Arco Gas premiums are 8 x 10, have a caption that goes right to the border of the photo, and the photo is cropped tighter on all four sides compared to mine.

I am curious if anyone has seen one similar to this and can help me figure out what it is.(Mine is the first photo, and Arco premium, which is not mine, is the second.)

Thanks!

I have never seen that one before. The placement of the autograph is different as well . There are some knowledgeable Clemente collectors here . You might consider posting it on the post war baseball card 365 Days of Roberto Clemente thread.

Thanks Mike! I didn't know about that thread and just posted there too.