Help with Goodwin Cobb Blank Back

[Blunder19]

Hey Everyone,

I wanted to ask the board for some help on this cobb... I have some doubts on it being a true blank back.. and if I am going to be a bidder on the card I want to be sure it is not altered.

Here are the concerns:

1) I have never (nor has any other collector I spoke with) seen a non-SLer with a double that has a blank back... So if only Slers are known to exist with a possible 2nd Blank back.. how does the cobb have a second?

Can anyone else provide me with a non southern leaguer example where 2 blank backs have been confirmed?

2) When I look at the scan on Goodwins site... it looks like the back is not smooth.. almost like there is some paperloss... also i see some hints of red around the top right of the back and the middle left of the back...

Do you think this card could have been skinned from a Sweet Cap back and made its way past SGC?

I have confirmed the same concerns with some of my collector friends... Any information on the above is greatly appreciated.