Offices in China, 1919, 30¢ on 15¢ Gray, o.g., never hinged, perfect centering amid beautifully balanced margins, rich color an exceptional freshness, Superb; with 1981 P.F. and 2015 P.S.A.G. certificates, the latter Graded (98, SSV $3,000). Scott No. K12  $210. AN OUTSTANDING GEM NEVER HINGED EXAMPLE OF THE 1919 30¢ ON 15¢ OFFICES IN CHINA ISSUE. $0 (Image)