1917, 1¢ green, A.E.F. booklet pane single. Natural s.e. at bottom, small corner crease, tied by "U.S. Army Postal Service, No. 2, Aug 29, 1917" duplex postmark on picture post card to Clifton Station, Va. forwarded to Washington, D.C., purple censor handstamp; light card edge toning and corner wear, F.-V.F., a rare single usage of the 1¢ A.E.F. booklet pane stamp from the scarcer first shipment of A.E.F. panes; with 2008 P.F. certificate. Scott No. 498f  Estimate $500 - 750. $0 (Image)