10c Orange Yellow, Panama-Pacific (400). Vivid color and impression, perfectly centered with Jumbo margins, neat strike of cancel, Extremely Fine Gem, easily one of the finest examples of this issue in existence, with 2010 P.S.E. certificate (Superb 98 Jumbo; unpriced in SMQ above the grade of 98, SMQ $790.00 as 98), this is the highest grade awarded to date and the only example to achieve this grade

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