1860s "Death to Traitors" propaganda envelope with Washington 3c tied by Philadelphia duplex, very fine and attractive (Image)

1899 (Sep 15) Haswell Drug Co. advertising cover depicting a dragon, with Washington 2c tied by Denver machine cancel with Topeka arrival bs, fine and attractive (Image)

1927 (29 June) Richard E Byrd flight across the Atlantic, envelope bearing 5c blue and cancelled NEW YORK NY G.P.O. Jun 21 2PM, carried by airplane "America" on its flight from New York to Paris and crashed, arrival marking on face VAR-S/-MER CALVADOS 2-7-29, Richard Byrd was the first to carry official mail from the US across the Atlantic, the flight ended abruptly in the waters off the French coast, severely affecting about 90% of the mail, very fine and rare (Müller 35'000 points), cert. Bolaffi (Image)

1971 SPACE: Apollo 15 mission 26.7. to 7.8.71 - small group including Aug., 2nd FDC signed in ink by astronauts Scott, Worden and Irwin, space rescue agreement numbered at back S/N A-151-009 and signed by astronaut Alfred M. Worden together with certificate by M.Worden certifying that the agreement was carried aboard during the lunar mission of Apollo 15 (Image)