Offices in China, 1919, 30¢ on 15¢ gray, top margin plate block of 6 with plate number 12589, o.g., plate single with h.r., others n.h., left vertical pair with natural paper wrinkle and gum streaking, well centered with bright fresh color, Extremely Fine and choice. Scott No. K12  $1,150. UNDOUBTEDLY ONE OF THE FINEST KNOWN PLATE BLOCKS OF THIS VALUE. $0 (Image)

Offices in China, 1919, 30¢ on 15¢ gray, bottom margin plate block of 6 with plate number 7926, o.g., four stamps h.r., center vertical pair n.h., Very Fine and attractive. Scott No. K12  $1,150. $0 (Image)

Offices in China, 1919, 30¢ on 15¢ gray, right margin plate block of 6 with plate number 12591, o.g., l.h. at top, others n.h., two natural gum creases, Very Fine and attractive. Scott No. K12  $1,150. $0 (Image)

Offices in China, 1919, 30¢ on 15¢ gray, left margin plate block of 6 with plate number 7928, without gum, bottom pair with small thin, otherwise F.-V.F. Scott No. K12  $1,150. $0 (Image)