Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 976:
1919, Liberation of Riga, 5k-35k, two complete sets of three, printed on watermarked Wavy Lines or thin paper, all are in blocks of four, three of which with center line perforation 9½ at the bottom, full OG, NH or LH (top stamps), VF, Est. $100-$150, Sc. # 43-45, 49-51
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