30c on 15c Offices in China (K12). Mint N.H., deep shade and detailed impression, mathematically perfect centering with Jumbo margins

EXTREMELY FINE GEM. THIS IS WITHOUT QUESTION THE FINEST MINT NEVER-HINGED EXAMPLE OF THE 30-CENT ON 15-CENT OFFICES IN CHINA ISSUE WE HAVE ENCOUNTERED. IT POSSESSES WONDERFUL COLOR, PERFECT CENTERING, FRESH PAPER, LONG AND EVEN PERFORATIONS AND TREMENDOUS OVERALL APPEAL. THE P.S.E. GEM 100 JUMBO GRADE IS THE HIGHEST POSSIBLE, AND THIS STAMP IS THE ONLY EXAMPLE TO ACHIEVE IT.

With 2010 P.S.E. certificate (Gem 100 Jumbo; unpriced in SMQ above the grade of 100, SMQ $7,250.00 as 100). This is the highest grade possible on the grading chart and no other K12's share it. As an additional indication of the difficulty in obtaining this in higher grades, the next-highest grades are 100 (one), 98 (one) and 95J (three).

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