Offices in China, 1919, 18¢ on 9¢ salmon red, top margin plate block of 6 with plate number 6922, o.g., never hinged (couple tiny natural gum inclusions), outstanding centering, Extremely Fine. Scott No. K9  $1,200. $0 (Image)

Offices in China, 1919, 18¢ on 9¢ salmon red, right margin plate block of 6 with plate number 11776, o.g., never hinged (few natural gum bends), bright fresh color, Very Fine and choice. Scott No. K9  $1,200. $0 (Image)

Offices in China, 1919, 18¢ on 9¢ salmon red, left margin plate block of 6 with plate number 11773, o.g., small h.r. at top affecting four stamps, others n.h., beautifully well centered, light selvage crease at bottom left, otherwise Extremely Fine and choice. Scott No. K9  $700. $0 (Image)

Offices in China, 1919, 18¢ on 9¢ salmon red, bottom margin plate block of 6 with plate number 11776, o.g., centered stamps with h.r., others n.h., fresh & well centered, Extremely Fine and choice. Scott No. K9  $700. $0 (Image)