On Feb 11, 11:38*pm, "Stupendous Man" wrote:
It appears to be missing whatever connects the
top of the file to spring loaded traveller on the overarm

It's possible they don't connect. On my 1930's Doall die filer, the
overarm acts like that on a scroll saw, providing downpressure to keep
the part on the machine's table. The spring just keeps the "foot"
tight against the part.