[Bigdaddy]

I'm no Cobb expert, but the many things on this postcard point to not authentic. In my line of work, we refer to this process as 'sensor fusion' - taking pieces of information from various sensors or sources and putting them together to come to a conclusion.

The first being, as the above responder pointed out, the Drew Max cert. The second is that the PC is postmarked from Brooklyn with no other apparent tie to Cobb. The third is that all the writing on the back (address, message) has been obscured, further eliminating any potential tie to Cobb. The Cobb signature seems to be out of place on this item.

So I can't say definitely, but clues are pointing to 'not genuine'.

Just some thoughts, and I realize that's not a concrete answer you are looking for.