Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1114:
1916, cover from Riga to Petrograd, originated from Evangelical Lutheran Church in Riga, addressed to Shlisselburg Convict Prison, violet oval censorship marking, Petrograd machine arrival ds on reverse, mostly VF, Est. $100-$150
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