[Jobu]

Here is another blank back Cobb (this same pair also sold at Legendary in 2009). It lacks the writing in the background:

http://www.legendaryauctions.com/lot-114794.aspx

Originally Posted by shammus

I should add, that my card is a blank back also and I feel there's maybe one other blank back out there which we never determined the origins for. It was a nice bit of detective work by a couple of our members to determine the origins of the version of this card that has the advertising on the back though....