Lot 2860 P
Liberia, 1957 1st Anniversary Air Service Issue, plate proof sets, three sets in perf and imperf format, each in 5 sheets of 25; includes solid (frame) color trial color set, frame only proof set and a black frame only trial color set, also includes both separate Tubman portrait and airplane vignette (15 sheets each in perf and imperf format) in black (240 sheets total), o.g., never hinged.Scott No. 362-363P, C107-C110P Estimate $1,000 - 1,500.