Thread revival.
check out this thread starting at post 7. Bloo is the man when it comes to ID-ing these!
http://www.garagejournal.com/forum/showthread.php?t=80960
-Dane
I'll guess Sawyer (or Oswego).
He is indeed the man. Called it before the pics.
I have since picked up a rusty, but fully functioning Columbian 506M2.
Still want to repair/replace the missing jaw on the Ontario/Oswego.
5" long u shaped jaws. Previous owner started cutting the notch off already.
One of the fasteners has been drilled out, I am drilling out the other.
Not sure where to go at this point: continue cutting and install a flat jaw insert or find/make a u-shaped Oswego insert?
There is a 4" on Ebay for a reasonable $10, so finding a 5" may not be impossible.