8c-24c 1923 Air Post, Large Die Proofs (C4P1-C6P1). Die sunk on 202 x 150mm cards, Nos. C4 and C6 signed "Harry S. New P.M.G.", No. C5 signed "Harry S. New", blue control numbers on reverse -- 1232686, 1233084 and 1233341 -- Nos. C4 and C6 with minor toning spots, No. C4 also with few scuffs clear of design

VERY FINE APPEARANCE. A RARE SET OF LARGE DIE PROOFS OF THE 1923 AIR POST ISSUE, SCOTT C4-C6. VERY FEW SETS ARE KNOWN.

According to the American Air Mail Catalogue only five sets of large die proofs are known. Ex Hennig. Scott value as unsigned

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