Emperor Karl 10 filler red with overprints Bani and Regatul Romaniei in circle (issued at Klausenburg) positions 51-52 and 61-62 in marginal block of 4, very fine with Koopman 1982 and Mihaly Bodor 2015 certificates: There is a black ink printing on the lower right corner of the 61th stamp. There are visible "Koopman" marks and lead pencil marking on the backside of the stamps, cat.v. 800+, Rare multiple!