Nicaragua 1929 Air 15c & 20c (DH-4 Aircraft over Mt Momotombo) IMPERF proofs on card (ex ABN Co archives) only one sheet of each exist (SG 629-30)
Nicaragua 1929 Air 15c & 20c (DH-4 Aircraft over Mt Momotombo) IMPERF proofs on card (ex ABN Co archives) only one sheet of each exist (SG 629-30)