137866 1944 LARGE AIR MAIL USAGE LONDON TO CHILE WITH 5S RED (SG477) AND 10S ULTRAMARINE (SG478b) X 2.

1944 LARGE AIR MAIL USAGE LONDON TO CHILE WITH 5S RED (SG477) AND 10S ULTRAMARINE (SG478b) X 2. Large envelope, 280 x 202, sent air mail from London to Valparaiso, Chile with KGVI ½d pale green (SG485), 3d pale violet (SG490), 1s bistre-brown (SG475) x 2, 5s red (SG477) and horizontal pair 10s ultramarine (SG478b) tied 'LONDON' date stamps 29 JA 44. Envelope some soiling but a rare commercial usage of the 10s ultramarine. (Ref 137866).