33-90
England-India extension from Rangoon to Singapore by Imperial Airways
The Rangoon-Singapore extension of the route as from December 1933
By kind permission of Peter Wingent
UK Post office Special notice (undated) annoucing the extension of the route to Singapore.
E 1-1, Rangoon to Bangkok
E 1-2, Rangoon - Bandon
E 1-3, Rangoon - Alor Star
December 1933 opening of the Imperial Airways & Indian Trans-Continental Airways regular service extension to Singapore.
15 Dec 1933 first flight from Rangoon on the above service to Alor Star (Kedah)
E 1-4, Rangoon - Singapore
33-95: Cover posted from Peshawar and oliterated with the boxed rectangular postal cancellation PESHAWAR G.P.O., 12 DEC 1933. Cover adddressed to Singapore.
Impreial Airways souvenir cover postmarked CAWNPORE / 15 DEC 33,  and addressed to Singapore. 
Imperial Airways extension to Singapore with Indian Trans-Continental Airways
 ISC 33-90: Cover cancelled KARACHI STG / 15 DEC 33 / 2 -P.M. and flown to Singapore on the first flight.
33-90: Cover flown from Akyab to Singapore on 16 December 1933 Postmarked Akyab Sor 16 DEC.33.
23 Dec 1933 Tavoy to Cape Town receiving a Christman Day "TOO LATE FOR AIR MAIL" cachet at Rangoon
33-90: Cover flown from calcutta to Singapore Postmarked Calcuuta G.P.O. 15 DEC. 33, and with an American Express Co. Inc receiving handstamp on the verso dated DEC 19 1933.
E 2-2, Bangkok - Bandon
E 2-3, Bangkok​ - Alor Star
E 2-4, Bangkok​ - Singapore
E 3-3, Bandon - Alor Start
E 3-4, Bandon - Singapore
E 4-4, Alor Star - Singapore
W 1-1, Singapore - Alor Star
W 1-2, Singapore - Bandon
W 1-3, Singapore - Bangkok
W 1-4, Singapore - Rangoon
W 2-2, Alor Star - Bandon
W 2-3, Alor Star - Bangkok
W 2-4, Alor Star - Rangoon
W 3-3, Bandon - Bangkom 
W 3-4, Bandon - Rangoon
W 4-4, Bangkok - Rangoon