used 1867 cobalt OG, neatly cancelled; small thinning and upper right corner rounded. A scarce shade. B.P.A. Certificate (1988). Photo | Christie's

Lot 815

815

used 1867 cobalt OG, neatly cancelled; small thinning and upper right corner rounded. A scarce shade. B.P.A. Certificate (1988). Photo

Details

used 1867 cobalt OG, neatly cancelled; small thinning and upper right corner rounded. A scarce shade. B.P.A. Certificate (1988). Photo

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