Derk,
I have not seen any leather handgrips like those before. I am not sure what to make of them. The parts lists seem to agree that MkI* carrier had the black rubber grips. This thread shows a later leather cover wood grip found on some MkII*:
http://www.mapleleafup.net/forums/sh...ad.php?t=31280
I note that they look fairly short compared to the rubber grip. Possibly a non-Canadian or non-carrier part?
That Lucas marked ignition filter is interesting. I wonder what journey it took to find its way onto your engine.
For the track adjusting cam, I do not have enough knowledge of non-Canadian cams to give an opinion if it is US or British produced.