1929, 2¢ Edison, flat plate. Tied by "Menlo Park, N.J., Jun 5, 1929" First Day of Issue machine postmark on cover to Auburndale, Mass., original autograph of Thomas A. Edison additionally tying stamp, Very Fine, a quintessential autograph first day cover signed by the inventor of the practical electric light bulb; with 2010 P.F. certificate. Scott No. 654  Estimate $1,000 - 1,500. $0 (Image)