Lot
2526 
/o
U.S. Back of the Book Collection including Airmails, on Scott National pages with Airmails, Special Delivery, Postage Dues, Postal Savings, War Savings, P.O. Seals, Parcel Post and Shanghai Overprints mint complete (K1-K18), note used C1-C6, C13-C15, C18, mint PS9, PS10, WS2, WS7b, etc. Estimate $750 - 1,000.
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Realized: $2,000