Maurice
Hopefully someone has seen the number already.
If no answer on here, then on facebook I recommend you ask on the "Elgin Regt" group. The researchers there have tracked a lot of T numbers and maybe someone has found it already.
Considering where your vehicle ended up, like mine, it is very likely it was moved by the Elgins 25th Canadian Armoured Delivery Regt, and if so, issue to "51" would likely be the Governor General Foot Guards (though of course there were other regts deliveries were made to).
I was lucky - these (and other) pages exist for mine:
I havent looked for your T number (yet) - sorry.
Good Luck
Tim