South Africa 1938 KLM New Years Day Voortrekker Monument Flight

1938 KLM NEW YEARS DAY / VOORTREKKER MONUMENT FLIGHT: Souvenir envelope flown by KLM from Pretoria to Amsterdam franked multiple Voortrekker adhesives, some overlapping the envelope, tied by cds Johannesburg 21 XII 38. Closure of the commemoration by Amsterdam cds31 XII 1938. Desirable Trek memorabilia. See additional image.