The restoration of this saw filer was the most amount of work yet! 0:00 Life-changing introduction 0:47 Disassembly 14:34 Head smash 16:09 Pouring new babbitt bearings 19:46 Brazing cast iron 20:47 Machining new brass knobs 24:16 Reassembly 36:38 Pain This tool is a saw filing and setting machine made by Black Diamond Saw & Machine Works of Natick, MA, U.S.A. sometime after 1911. The original patent from 1909 can be seen here: https://patents.google.com/patent/US9... Unfortunately, the saw setting attachment has been lost, but I would love to find it one day. This particular machine showed signed of been very well used and repaired in ways that suggest it was used in a production environment. I ended up needing to pour new babbitt bearings, machine new parts, repair old parts, replace fasteners, and completely change all the paint colours to get the tool back to a more original state. I absolutely love saw filers and settings since they have some of the highest gizmocity of almost any tools their size. I will be saving this one for my personal collection.