1, 50 Rbl. on 15 Kopeken postage stamp, hand-stamped overprint in Type III (swastika 6 mm), horizontal pair where the left stamp has an inverted overprint, mint never hinged, flawless condition, unsigned, photo certificate Walter Zirath BPP (2025) "This stamp is one of the greatest rarities of the German occupation issues during World War II.", Michel 14. 000.- very rare and rarely offered stamp! Only three pairs of this type are known to exist!