Identifying transistor
I don't have definitive answer, but I'll show my working up to this part so others may also use this approach to find these answers in the future.

Searching for the company logo I see this:



Which is possibly the right hand logo with the embossing obscuring it.

I got this logo picture from here.

If this is true, then this is not a transistor but either a Sensitive Triac or a SCR under that companies nomenclature.

However, I note that this is not a part number for Teccor.  However, on a TO-220 package it is hard to put a whole part number. So this may be short hand version.

Searching on the data-sheets I cannot find the package labelling codes.

This company is now owned by littlefuse,so part labelling guidelines may have changed.

This should give you enough to test the part for characteristic behaviour.  i.e. if you put this in a transistor tester and I am right, then it will fail.