$375 net to me. (SOLD)
This is almost certainly a proof for the Arco Gas set. It measures 9.75" x 10" - the weird photo angle is because it is too big for my scanner. This is not a photo on photo paper but likely a production print as they decided how to crop it and where to put the signature. Note there is a stain next to his shoulder, but this is likely a 1-of-a-kind item, so it matters less, right?
The Arco Gas premiums are 8 x 10, have a caption that goes right to the border of the photo, and the final premium photo is cropped tighter on all four sides compared to this one.