Opinions about originality - LW officer with rare Afrika cuff title

[angriff]

Hello guys!

Please your opinions about originality of this rare portrait.
Seller didnt write about originality in the description but he tells it's 100% original.
But! I dont like backside. Also the seller has not Paypal, it means I cant return my money back.

[angriff]

[Andrew Harris]

Better scan of the reverse is needed. 600 dpi at least.