Nice find indeed! Chassis/ cowls and chassis/ cabs shipped over from Canada, after assembly they were fitted with locally made
Indian Pattern bodies and canopies at "A Defense Plant In India", most likely Bombay. I like to see how they are driven off for body fitting, possibly only a crate for the driver to sit on.
Some more interesting footage to be seen if you scroll down for "similar videos". I wonder where the people from pond5/ RetrofootageExclusives got this footage?
https://www.pond5.com/stock-footage/...building-tanks