1915-70 Back of the Book collection on pages, with "BLP" overprints, few better items and varieties, six unused envelopes with uncanceled franking, later issues used and unused, three folders with sets canceled by special pmks (B20-25, $1,050), Airpost with C1-2 on cover and card, Pneumatic Post issues complete unused, also some used, Special Delivery with imperf. sheet margin single (E1a), inverted surcharge (E11a), other minor varieties, shades, shifted surcharges, Authorized Delivery stamps, some covers, etc. (Image)

Est.$1,000