Why does so much here have to be turned into a fight? I'm heartily sick of it. Even when people are being needlessly provocative, sometimes it's just best to ignore it: it's usually trivial, it passes and is forgotten. Also, none of it answers the original question.
The vendor put those copy-protection marks on the reverse of the photo and, while it's no doubt their standard procedure, it does look likeoverkill in this case.
So, trying to do something constructive instead, here's those two words after a bit of Photoshop adjustment, just in case that helps.
Also, it might be worth looking through the extensive
TSAMO website material on the Polish campaign for clues to places that Stab II./JG 77 was based.
Everyone involved, back on topic please.