All I've found is this:
"This camera has a special engraving on its accessory shoe that I'm not able to determine exact origin (the preceeding owner told me he bought the camera new at a camera store in Seattle in the late sixties). The engraving consists in the capital letters TE in a rectangle. Paint is black. Seems uncommon. The location of that engraving on the accessory shoe seemed strange to me (since such markings were more often situated on the top plate) until I see a model P with the EP mark also engraved on the cold shoe.
Peter Dechert's opinion is that it was more likely a camera used by some organisation such as a Newspaper Office etc., not a Canon engraving.
Peter Kitchingman is a Canon Rangefinder researcher (Requesting Canon RF Cameras and Lens Serial # for its research database - see website :
http://www.canonrangefinder.com ) and has recorded three cameras with the "TE" engraving to date."
From here:
http://photocam.ibelgique.com/canon.htm
Curious to know what you learn.