I think that the "old file" brand was introduced by by a pair of brothers (?) in Havana illinois...
they had a 6 pin version early on about 1906 ish.....and "Old File" went under as a company
about the mid 1960s...that one pictured might have had "old File" embossed on the handle as well, and
looks like a later one?
As is, an "old file" kitchen knife can fetch about $20~30 bucks to a collector...they are very
good working knives.
T.C.Albert