[Lynn Eades]

Here are some more differences between Canadian and British built carriers.
The top turn buckle is Canadian. it has bigger diameter ends where the pins go through. The threads are not the same as the british ones which have the shorter brass section. the British ones come in the two variations shown at the bottom. I have not identified the theads.
The tank straps vary in that some have spot welded ends and some have riveted ends. This may be due to earlier/ later production, or even a sub contractors choice.