12c Brown Violet, Large Die Proof on India (564P1). Die sunk on 152 x 203mm card, typed "Approved February 27, 1923" and signed by Postmaster General Hubert Work, blue control no. 1203185 on back, deep dark color, Very Fine and rare, this is the only example contained in Power Search, with 2007 P.F. certificate, Scott value as unsigned proof, accompanied by a photocopy of a letter from Hubert Work stating this and other proofs were prepared for presentation to President Calvin Coolidge

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