C2 16c Jenny tied by First First Flight July 15, 1918 Wash. NY. Phila. Air Mail Service hand cancel from Washington, neatly opened at right and top, catalog value $750.00. (Image)

Est. $200-250

C4 8c Propeller single tied by Washington, DC. machine cancel and serviced by Hammelman, opened neatly on left. Catalog value $350.00. (Image)

Est. $150-200

C5 16c Insignia tied by Washington, DC. machine cancel, typed address to and serviced by Edward Worden, very clean. Scott $600.00. (Image)

Est. $250-300

C7 10c Map unlisted, A.E. Gorham thermographed Corner Card in green with blue text, Chicago First Day cancel, then flown to Detroit via Detroit, one of the scarcest legs with this Gorham cover. Only the 5th have offered with past sales over $300.00, scarce! (Image)

Est. $200-250

C10 10c Lindbergh Unlisted cachet in red and blue with scarce plate block of four tied by Little Falls, Minn. hand cancel. Typed addressed to Frank Mitchell Wright, quite clean! (Image)

Est. $125-150

C17 8c Winged Globe Plate Block #UR21028, uncacheted Air Mail envelope, tied by semi- official Ben Franklin Station cancel, addressed, scarce franking. (Image)

Est. $100-125

C17 8c Winged Globe unlisted, Harry Ioor general purpose Naval cachet in red and blue, USS Constitution cancel. RARE signed by HARRY MOORE, who was the mail clerk on board the ship. (Image)

Est. $125-150

C17 8c Winged Globe Planty #4, Ed Hacker cachet printed in green, pneatly opened at top, printed address, and scarce. (Image)

Est. $80-100

C17 8c Winged Globe Planty #8B, Fairway cachet in green, red, and blue with scarce USS Constitution unofficial cancel, the first we have offered in over 40 years, scarce. (Image)

Est. $100-125

C18 50c Zeppelin tied by very scarce semi-official New York, NY City Hall Annex hand cancel, typed addressed, a seldom seen cancel. (Image)

Est. $125-150

C18 50c Zeppelin with rubber stamped cachet in black, FIRST DAY Chicago IL 10/7/33 cancel flown to Friedrichshafen with back stamp. seldom seen. (Image)

Est. $150-175

C18 50c Zeppelin, purple rubber stamp cachet with Miami (10/6/33) first day cancel and flown to Chicago. (Image)

Est. $150-175

C18 50c Zeppelin tied by New York G.P.O. first day hand cancel, to Germany via "steamer", crisp and clean. (Image)

Est. $100-125

C18 50c Zeppelin unlisted border in red and blue, single tied by New York NY machine cancel, typed addressed. (Image)

Est. $100-125

C18 50c Zeppelin Planty #4, Anderson cachet in black with New York, NY. October 2, 1933 machine cancel, clean and seldom seen. (Image)

Est. $200-250

C18 50c Zeppelin Planty #9, Aerophilatelic Club of NY cachet in blue tied by New York G.P.O. hand cancel First Day cancel. (Image)

Est. $150-200

C19 6c Winged Globe tied by First Day June 30, 1934 Baltimore, MD. cancel with additional 2 cent value tied by Baltimore cancel. Serviced by Bithell, catalog value $200.00. (Image)

Est. $100-125

C19 6c Winged Globe rare pair tied by June 30, 1934 Baltimore cancel. Only the 3rd we have offered with a pair as most are postage due or blocks of four. (Image)

Est. $100-125

C19 6c Winged Globe Planty #3, blue rubber stamp cachet, unofficial Newark, N.J. A.M.S. cancel, addressed. (Image)

Est. $100-125

C20 25c China Clipper Planty #11, Unknown printed cachet in purple with red and blue printed border, single tied by San Francisco CA machine cancel, typed addressed, seldom seen. (Image)

Est. $100-125

C20 25c China Clipper Planty #20, Espenshade cachet, folded card with red text and Pacific map with single tied by San Francisco, CA. to HAWAII, seldom seen, seldom offered. (Image)

Est. $125-150

C20 25c China Clipper Planty #21B, M.C.P.S. cachet in black, Washington DC cancel, scarce. Only the 3rd we have offered in over 40 years, scarce. (Image)

Est. $80-100

C20 25c China Clipper Planty #29B, William Raley cachet in red, green, and blue. Only the 4th we have offered with the last three averaging over $250 each, rare! (Image)

Est. $150-200

C21-22 20c-50c China Clipper on uncacheted cover, foreign destination to England and sent "EXPRESS", the first we have seen on over 40 years, rare! (Image)

Est. $100-125

C21-22 20c-50c China Clipper on uncacheted cover, foreign destination to Argentina with destination markings on front and reverse, the first we have seen on over 40 years, rare! (Image)

Est. $125-150