South Africa 1974 Nairobi Lufthansa Crash Cover

SA: 1974 NAIROBI LUFTHANSA CRASH: Registered cover from Netherlands to Cape Town bearing a strike in violet of the English/Afrikaans cachet: "RECOVERED FROM AIR CRASH ON 20 NOVEMBER 1974 AT NAIROBI / HERWEN VAN LUGRAMP OP 20 NOVEMBER 1974 TE NAIROBI." Bearing Dutch stamps tied Gravenhage Central Station cds 18.XI.74 and backstamped Maitland Depot 11XII 74. Some faults as usual, nice unusual acceptance, scarce.