I obtained it from a reputable coin dealer in the U.S. I don't have any doubts based on the dimensions or weight, just the undocumented mismatch of initials and date. Is it a variation or just dubious? The characters above the A.T reflect the date, 1810. I have the 6th edition of KM and the plate coin there appears to be 1805. Don't know what coin is in the 9th. The Numista coin looks like 1831. Looking at my old KM volume 2 and the plate coin looks like 1805 A.K but that combination is not even listed in that edition! Nice to keep that old hardcover copy around. It has a lot of images missing from later editions. Nice quality shots too.
Hah! My Standard Catalog of World Coins, 1801-1900 - 8th Edition photo of KM 75 appears to be an 1805 SI. There is NOT an 1805 A.K listed in the 8th either! Wow! A KM hardcover? I don't think I was aware that existed.
Excellent! I've been wanting to go to Serbia! Another pretty zinc coin; a 1942 BP two dinara (KM 32).
Moldova and Walachia 1772. This coin was made by Russian militari authorities from a Turkish trophy guns.