British Commonwealth 1937 group of 10 airmail covers from and to South Africa incl.  Coronation George VI & Queen Elizabeth KGVI sets on FDCs : Nyasaland 3v  Michel:  49/51 ; Basutoland SG15/17 ; Bechuanaland Protectorate Sc 121-123 FDC ( Botswana) ; Swaziland S/G 25-27., along w. 4 other mixed and multi franking  diff cancelations. nice group.