Hi
I know its been awhile since the was posted but i have just enroled and would like to make a comment on the hinges in your photograph.
The hinge on the right is a British Army replacement hinge, normal the originals were removed and this type was fitted when the vehicles were overhaul in the 50s, these are a little stronger than the oringals and most h/ tracks you come across that are ex British Army will have them fitted.
The French did a similar thing when overhauling there h/tracks, they look very similar to the British hinges