Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Vatican City - 1949, 75th Anniversary of the UPU, 300L ultra and 1000L green, bottom left corner sheet margin imperforate blocks of four, proof like colors, full OG, NH, VF and very rare, Scott just mentioned these imperfs, but no priced, Sassone #PA18a-19a, C.v. €48,000=US$55,200 as singles, Est. $8,000-$10,000, Scott #C18-19 imp