The coronation of King George VI was a historic event that took place on May 12, 1937, in Westminster Abbey, London. To commemorate the occasion, philatelists in Burma produced private commemorative covers on the same day.
Mrs. Reardon from Meiktila created several covers, cancelled on May 12, 1937, at Meiktila PO. She used newspaper cut-out portraits of Their Majesties King George VI and Queen Elizabeth as cachets. Each cover has different cachets and is unique due to the use of cut-outs. I have two examples from my collection, which I have displayed below.
Famous philatelist Naigamwalla also produced several types of covers to commemorate the coronation. The two basic types are displayed below, with two variations for each type that have been documented in Steven Zwillinger's Naigamwalla cachet catalogue.
To date, I have only come across the commemorative covers produced by Mrs. Reardon and Mr. Naigamwalla. It is possible that other types were produced by other philatelists, but I have yet to discover them.