Auction 90, Session 2 - Worldwide Rare Stamps and Postal History
Lot 1271:
Types 6 and 7 (Railroad Post Offices): 1918, two different black overprints on perforated 35k and 50k; and on perforated 50k and imperforated 1r, all are postally used, F/VF, properly expertized, C.v. $600, Est. $350-$450, Bulat #804-05, 806-07
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