South Africa 1932 Cape Town to Pietersburg, Pilot Signed

SA: 1932 Imperial Airways FIRST FLIGHT Cape Town to Pietersburg. Registered envelope franked adhesive totalling 8d (incl 4d triangle) tied departure cds 26 JAN (all registered mail postmarked day before flight) and on reverse transit cds Johannesburg 27 JAN with arrival cds 28 JAN. SIGNED BY PILOT, CAPT RF CASPAREUTHUS. VF, scarce.