Charles Snee at Linn’s Stamp News reports a new tagging-omitted error on the United States 1967 20¢ black olive George C. Marshall stamp with dull gum (Scott 1289b) was recently discovered in a left corner margin block of 24.This block of 24 United States 1967 20¢ black olive George C. Marshall stamps is shown under…
Shortwave UV light reveals block of 24 U.S. 1967 20¢ Marshall stamps with tagging-omitted error
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