Canal Zone, 1918, 2c vermilion & black, "Specimen" overprint in blue. With small hole control punch, block of 12 containing 2 booklet panes of 6, o.g., never hinged, bright and fresh, perf separations at left and facial scuffs affecting top left vertical pair, otherwise Very Fine. Scott No. 53cS  Estimate $500 - 750. $0 (Image)