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Series: 125th Birth Anniv of Ostrovsky
USSR, 1948, 30 kop. 12 (1/2) and Imperf. green
Catalogues: CFA "Souzpechat": 1258Michel: 1217Scott: 1227Stanley Gibbons: 1367Yvert et Tellier: 1211
Plots: Ostrovsky Aleksander