1925, 2¢ Lexington-Concord (Scott 618), o.g., never hinged, a stamp that shouts "perfection!" in intense color on pristine paper with mathematically precise centering, a Superb gem, only one stamp attains this lofty grade in PSE's Population Report, with a single 100J higher, with 2020 P.S.A.G. certificate graded Gem 100.
SMQ Gem 100; $400. (Image)

Estimate $300-400