Sale 1229 Worldwide Stamps and Postal History

CANADA, 1932, 6c on 5c Brown, Air Post, Pair, One Without Surcharge (C3d). Block of four with selvage at left, top pair lightly hinged, bottom pair Mint N.H., bold color on fresh paper, Very Fine, a rare error block of which only ten pairs thought to exist, ex Boonshaft, with 1966 P.F. certificate, catalogued as two pairs, Scott 2,300.00, Unitrade C3,000.00 (Image Magnifier)

(View PDF of certificate)