Lot 60214 – World Class Airmail Rarity – 1932 (May 19) $1.50 on $1 deep blue « Dornier DO-X » with surcharge inverted in mint n.h. block of four

World Class Airmail Rarity1932 (May 19) $1.50 on $1 deep blue « Dornier DO-X » with surcharge inverted in mint n.h. block of four showing the complete setting, a wonderful multiple with superb centring and freshness, one stamp with small natural gum skip at top, thought to be one of only three or four surviving blocks (although we have seen no other) with only 40 stamps in total believed to have been printed (Unitrade C$240’000 as four n.h. singles; S.G. £84’000 as four singles)Expertise: Cert. Bolaffi (1975) with each stamp signed in pencil on reverse, and BPA (1998).Provenance: Harmers of London 18th Nov. 1998