David
Here are some pictures of the levering mechanism. This first picture shows the parts
from two revolvers, along with their springs.
This next picture shows the mechanism disassembled, so that you see both pieces.
The inner piece has a little roller on the end of it, and that fits inside the trigger.
This next picture shows the inner lever inserted into the rear of the trigger.
The last picture shows the mechanism assembly inserted into the rear of the trigger.
Regards, Mike Priwer