The CLP5 semi-official stamp was issued on October 1st,1924 and put on airmail covers for the first airmail flight planned from Estevan, Saskatchewan to Winnipeg, Manitoba. What initially seemed to be a publicity stunt toward the use of airmail was instead a marketing operation planned by two promoters of a local industry, coal mining.
The Estevan to Winnipeg flight promoter and his associate had personal interests in the Eureka Coal and Brick mining company. On the back cover, we even have a commercial invitation: « Buy Estevan Brick ».
The pilot, E.A.Alton took-off from Estevan under nice weather on the morning of October 1st,1924 and headed east toward Winnipeg. He was supposed to do a stopover in Brandon, to refuel, but engine problems forced him to land in a field in Bienfait. During the landing, the wheels hit hidden rocks and the aircraft was wrecked.
The pilot quickly transferred the mail to the Bienfait Post Office where it was put on the Souris train to Winnipeg. The mail arrived late but on the same day at destination.