As riddled with drill holes as it is, it has every appearance of being a French arm, in my opinion.
I know early Champion, Mura, Lenz, and French used Tradeship comms for a short period of time before the Kirkwoods became the comm of choice for many years. Tradeship made 16D/26D and 36D comms in 3 different timing cuts in both CW and CCW directions. They were 0°, 11° and 22°. 0° comms were either brown or black. 11° comms were usually gray and 22° comms were brown.
I have a few of some of those comms NOS I have picked up here and there. Most of mine however are CW direction. I guess most of the CCW ones got used up back in the day or hoarded up in people's stashes.
Someone on ebay is still selling ones he got somewhere. They are brown with a 22° CW cut and fit .078" shaft.
https://www.ebay.com...ommutators.TRS0
His ebay ad says 0 degree timing. The ones I got from him were 22 degree CW. The ones he shows in his pictures are 22 degrees CW.
FOAMY SAID:
"You haven't lived until you had to dremel the corners off the stacks because you ran out of balancing room for drilling. . ."
Well, Dennis, I guess I have lived. I haven't had to do it much, but I have done that a few times