ΟΟ-21
Coins ... ΟΟ-21 4001 ... 20 October 1947
Cut by North Wall of Poros Building Annex. Over Repair under Limestone Wall at North ... ΟΟ-21 4002, 4003
Cut by North Wall of Poros Building Annex ... ΟΟ-21 4004, 4005 ΟΟ 1562 MC 842 ΟΟ 1537 P 20853 Lot ΟΟ 760 ... 27 June 1950
ΟΟ-21 4006, 4007 ΟΟ 1538 P 20854 Section ΟΟ 657 Section ΟΟ 658 ... 27-28 June 1950