M101 CDN reflectors are IMPOSSIBLE to find.
I am putting mine on a M 416. if you go to the website and click on the more info link under the picture all the specs are there.
Ahhh - thanks! A perfect 70mm for us M101 owners.
Will check the trailer this evening and post up my findings. Despite the M101 being Canadian, I've found everything on it so far to be standard and not metric - at least the bolts used on the original wiring harness.