Did you go to the comc.com link I provided? True progressive proofs don't have printed backs. They're just test printings to see how the colors line up; they don't waste ink printing backs. Many of comc's descriptions are incorrect; they should describe all the colors involved in the progression (magenta/black, cyan/black, yellow/black, etc). And like I said, yours looks like a magenta/black progressive.
tyxander wrote:
It's card stock not a metal plate. Definitely 2013 national convention but the blank back got me stumped now?
Someday my cards may double in value and then be worth half of what I paid for them.