[Lynn Eades]

What exactly are you after?
The early carriers used these sprung loaded arms, that meshed with the toothed insert (two in photo. one undrilled) this Pawl, ratchet, was part of the adjustable casting, that the front bogie wheel mounted on. the later carriers just used the flat toothed washers that went on the (3) mounting bolts. The one with the tongue is from a Brit. carrier, the other from a Canadian carrier.
The last pictue show the springs at the front of a Bren (Pre Universal, same as early Universal)which hold those arms into the pawls.
Let me know if you want more.