10c Ultramarine, Special Delivery (E11). Mint N.H., mathematically perfect centering with wide margins, proof-like impression on bright paper

EXTREMELY FINE GEM. THIS SUPERB EXAMPLE OF THE 1917 PERF 11 SPECIAL DELIVERY ISSUE HAS BEEN AWARDED THE PERFECT GRADE OF GEM 100 BY P.S.E. THIS IS THE ONLY EXAMPLE TO ACHIEVE THIS GRADE.

P.S.E. encapsulated (Gem 100; unpriced in SMQ above the grade of 98, SMQ $650.00 as 98). This is the only example to achieve a Gem 100 grade to date (only two have graded at 98J, one offered in the following lot)

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