Mountain Siler Lock. Precision assembled by Jim Chambers. Each lock is carefully assembled from the finest carbon steels available and is heat-treated for long, reliable service. All bearing surfaces are polished. Tumbler axles are lathe-turned to exacting dimensions. All bearing holes are drilled undersize and then reamed for extra smoothness. All locks include a fly in the tumbler for use with set triggers.

Plate is 4-3/4" x 13/16" wide. Right hand only.  Takes large Siler internal parts.  Round tail. Plate cut for drum.   No. 42SL6