Steve, the Canjar was available for a number of rifles with either a weld-on or a screw-on tang extension but this doesn't look like either Canjar to me. BTW Canjar at one time DID offer a replacement M70 trigger finger-piece with fully-adjustable sear engagement and this may well be one of them.

Here's a pic of a Canjar for a 1903 Springfield with screw-on tang extension. The weld-on looks the same except for the attachment. A LOT simpler than the one in Michael's photos!
IMO Canjar made by far the nicest replacement triggers, period.
Regards, Joe

You can lead a man to logic but you can't make him think. NRA Life since 1976. God bless America!