1c Green, Perf 10 x 11
(542). Rare bottom selvage block of four, tied by First
Day Washington D.C. May 26, 1920 6:30 PM machine cancel and additional
ovals on standard-size cover to A. E. Owen in Montclair N. J.,
neatly opened at top, tiny tear, Extremely Fine, a rare multiple usage,
this is only the second FDC with a block of four we have handled, with 1969
P.F. certificate, Brookman catalogue value for a pair is $2,500.00 (Image)