Knowing the VIN number (maker's SN) is very useful but it is the Canadian Army Registration number (CAR) later called CFR # which is a main way by which one traces the history and painted on markings. Sadly, Canada DESTROYED her records of ex-military vehicles unlike the UK.
You are fortunate it is so original. The regular army used numbers on the coloured backgrounds whereas Militia tended to use abbreviated titles on a white bar above the coloured unit sign. The red/blue is artillery. Rob Love's info if most useful ... to to trace more of the history, one needs to look through the archives of the RCA Museum in CFB Shilo hoping to find in service photos of it and accident reports or lists of vehicles with showing the CAR/CFR number.
The CAR number was painted below each doorway and also stamped into the top of the left frame rail between the front bumper and the grille.
The jeep likely served 1952-c.1971. It may well have served with a variety of units and sanding down to find the markings is advised. The platform on the right front fender is for the Antenna Tuning Unit (ATU) for the C-42 radio. You will likely find a Western Command decal and udnrneath that, a Prairie Command decal.
Correct trailer for this would be the M100 or M100CDN.
Colin MacGregor Stevens
Richmond, BC