A few days ago, 1941 Banja Luka fake was sold on one of the eBay auctions...
eBay auction: 36 bids and a final price of 183.50$ shows that customers did not know it was a fake.
Genuine stamp from position 17 (left) and fake from the auction (right). Fake overprint is narrower and lower.
Checking just the first line - genuine (above) and fake (below) - the difference is apparent. See also details of "S", "b" and "d"...
