South Africa 1931-1937, group of 11 Airmail covers to England and India bearing diff stamps:

S.W.A 1931 10d Air Black & Purple-Brown SG87, block of 4;

S.W.A 1931 3d Air Brown & Blue SG86 (x4);

S.W.A 1930 4d  (x5) ; 1/ Airmails  SG70-71;

S.W.A 1937 1 1/2d Purple-Brown SG96, block of 4

1937 King George VI Sc# 125-132 , set of pairs

Triangles 4d. - imperf and perf w. two types ovpt. 

Attractive use of Imperial Airways Air Mails, first flights Reg. etc.'