FRANCE, 1849, 20c Blue on Yellowish, Unissued (4b; Yvert 8).
Without gum as issued, with huge sheet margin at left,
other sides large, bold color with a sharp impression on fresh paper, Extremely Fine Gem, this was intended to replace the 20c Black though was never issued due to a change in rates making this value unnecessary, despite the error in Scott, this stamp never has gum despite its counterpart on Bluish paper and in Dark Blue (Scott 4-4a; Yvert 8a-8b) which is known with and without gum, signed A. Brun, with 2020 Roumet certificate, undervalued in Scott at $2,750.00, Yvert €5,250
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