Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Italy - 1933, General Balbo Trans-Atlantic Flight issue, 5.25L +19.75L and 5.25L+44.75L, complete set of two triptychs in unfolded sheets of 20, first one has a gum flow affecting top right stamp, full OG, NH, VF and scarce multiples, C.v. $11,500 as single sets, Sassone #S1509, C.v. €17,625, Est. $4,000-$5,000, Scott #C48-49