Lot
256 
Offices in China, 1919, 40¢ on 20¢ deep ultramarine, top margin plate no. "12594" block of 6, o.g., minor gum disturbance on one stamp, well centered, deep rich color, Very Fine and choice, a beautiful top margin plate block; with 2016 P.F. certificate. Scott No. K13 $1,300.