London Experimental Datestamp on 1794 Falmouth Packet Letter to New York. Datelined "London, 7. March 1794" and postmarked the same day with the experimental datestamp used only in March 1794. Addressed to New York and prepaid the treble sheet rate of three shillings. Carried on the packet Portland which departed Falmouth 21 March 1794; light filing crease, still Very Fine, and quite rare. Estimate  $2,000 - 3,000. $0 (Image)