C2-3, 1918 16c-24c Airmail, 6 covers/cards on exhibition pages, showing various types of combined services, post card rate, special delivery/registered combined rate, 24c on postal (overpaid 2c), etc, includes: C2, x2, C3, x4, Very Fine covers. (Image 2) (Image 3) (Image)

CV. 300-400

'"C2, 1918 16c Green, Fine, tied on cover to Philadelphia by purple 7/13/18 Air Mail Service CDS, addressed to Eugene Klein, Very Fine cover, pencil notation on reverse ""Klein says earliest date stamps were on sale anywhere, sent only about 5"", none of the others, that we are aware of, have shown up, specialists question the existence of genuine FDC''s (July 11), an extremely Rare usage. 2015 PF certificate."' (Image 2) (Image)

CV. 3,000-4,000

C13-15, 1930 65c-$2.60 Graf Zeppelin set, complete set on card + 2 covers, all tied by various 4/26-6/2/30 machine cancels, first Pan American flight, all appropriate handstamped cachets and pictorial backstamps, light cover toning, still Very Fine set of covers. (Scott $1,200). (Image)

CV. 400-600