WORLD COINS. THE QUENTIN ARCHER COLLECTION OF RUSSIAN MEDIEVAL COINS. GRAND PRINCIPALITY OF RIAZAN. Oleg Ivanovich (1350-1402), Denga (2), tamga of ruler overstruck on imitation of dirham of Golden Horde, 1.31g (O 426), very fine; similar, small tamga, 1.37g, very fine. (2)
both bought G A Singer, February 2008
Estimate: £150-200