Northern Rhodesia 1939 Barotseland Airmails Flight Cover

NORTHERN RHODESIA: BAROTSELAND AIRMAILS: 1939 First Return Flight MANKOYA - LUSAKA, connecting via MUMBWA: Cover bearing KGVI 1½d tied Mankoya cds 3 JAN 39 with Lusaka arrival cds 4 JAN 39. SIGNED BY PILOT H R KIRKMAN. Very few carried, not all signed. VF, rare.