1c Green & Black on Violet Paper, Inverted Center (RB1ad). Deep rich colors and proof-like impressions, bold cancel, completely sound

VERY FINE. AN EXTREMELY RARE SOUND EXAMPLE OF THE ONE-CENT PROPRIETARY INVERT ON VIOLET PAPER. ONLY 24 EXAMPLES ARE RECORDED, MOST OF WHICH ARE FAULTY.

In his privately published census, Larry Lyons records 23 examples of this invert error, most of which have thins or creases, or are off center. We offered one additional copy in our 2006 Tolman sale, bringing the total to 24. Of these, sixteen have faults, leaving only eight sound or potentially sound copies. Almost all of the potentially sound copies have centering similar to the example offered here.

With 2008 P.S.E. certificate (F 70; unpriced in SMQ)

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