Netherlands, Rocket Mail, 1940s/1960s, selection of covers and labels, with five "Flying Saucer Mail" cachets from various countries,
Netherlands, Rocket Mail, 1940s/1960s, selection of covers and labels, with five "Flying Saucer Mail" cachets from various countries, signed H.J. Alderhof and Dr. A.J. de Bruijn, Netherlands Ellington-Zwisler #49A1 Amsterdam label, #52A1-52A1a mint sheetlet of four and used single, #85A1 label, #90C1-90C1a covers, #97A1 sheetlet, two "Cosmos Mail" cancelled covers, and several other unlisted commemorative labels and covers, unusual, fresh and fine-very fine.
