I just submitted a 1920's Cletrac crawler photograph in another 'thread' and, while thinking about that, thought I ought to look for a handful of work photographs from the firm that I have here.
man at a press (stamping brackets for a sled, I think):
man at a press (perhaps bending sled runners):
young workers on rivetting machines (again, sled runners and brackets):
I've owned these photographs for 40 years.