Front portion of envelope only, with cancelled ten cent air mail stamp.;This postal cover is one of the first letters sent by air mail in the US. It was sent from Grand Rapids to Detroit via the first regularly scheduled air mail route.;Black ink, W. T. Adams/c/o C. A. Olson/101 Penobscot Bldg./Detroit, Mich. Near cancellation in black ink 'Via Air-Mail. Cancellation; GRAND RAPIDS MICH./JUL 17/4 30 PM/1928.;From an exhibit given to Kent County Airport in 1988. Exhibit was credited Exhibit concerned and produced by Earl Spielmacher, with help from Karl Spielmacher, Bill Alexander, Mar: Kitanc..ski and Dean Buskirk. Disposed of by airport during 1998 renovation.;Return address in faint ink: E. F. MaCrone & Co./Ground Floor Peninsular Club Bldg./Phone 94101/Grand Rapids, Mich. |