Lot 61537 – 1935 Airmail Proofs of the Surcharge in black 7½p.

1935 Airmail Proofs of the Surcharge in black 7½p. on 4½p. red-brown and grey irregular block of twenty-six, [3-4, 8-9, 11-14, 16-33 and 36-47], stamps [9], [11], [16] and [21] variety Arabic “1/3” instead of “½”, [32] with “7¼” for “7½” and [36] with Arabic letter inverted, large part original gum. A fine, rare and spectacular multiple from one of only two sheets that were printed showing the errors that were corrected before the stamp was issued. Cert B.P.A. (2011).