24c Purple, Trial Color Proof on India (164TC1).
On 58 x 71mm card, rich color, almost indistinguishable from plate proofs except with "Sample of Purple"
written in pencil at bottom, Very Fine and choice, a most unusual item, we have chosen to classify this as a Trial Color rather than a Die Proof as it has a slightly different shade than the usual 24c proofs and has the color notes at bottom, this color unlisted in Scott
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