Thank you for the comments,
I'll check the data plates and I will tell you more.
in the while i have a couple more question
:
First, I stolen this pic from the net, can you help me to locate where to look for this kind of label in the car?
Second: long time ago i have seen some pics from (if I remember well) a Canadian Museum showing a CDN M151a2 (between many others) on display with what was defined as "a canadian ingenuity winch" made with two cylinders applied to the rear wheels and a rope.
Anyone can help me to locate the museum and tell me if it was an official standard CDN device/transformation (also drawings and instruction would be fantastic informations).
I thank all you in advance for your invaluable help.