21 - 22 September 1993
1863 (Jan.) ½a. letter sheet (flap missing) to Calcutta cancelled by clear "B/159" and showing, on reverse, a light, legible strike of the "SANDOWAY/P.O." double-ring d.s. in red. Rare. Ex Dahlmann. Photo.
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From labels and staples to stretchers and repairs — the reverse of an artwork can reveal more about it than you might suppose
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