I recently bought a Disston Compass saw that is complete but cosmetically worn,
including a wavy blade with the requisite rust and white paint.
I took it apart as a first step towards starting work on it in preparation for
putting it aside for month's (Years?)  before getting back to it. 😊
While apart I though "Lets make a quill to screw the saw nuts into for cleaning
on my drill."
My eyeball gauge indicated an anomaly in front of me and after doing some
measuring and checking with a thread gage I now believe that I am looking at a
#12-20 thread.
I  guess it was foolish of me to believe that this affliction was reserved only
for Stanley tools.
Where I live used to have many tradesmen, toolmakers, machinists and I often buy
stuff and sometimes find odd sizes of tooling in my collection.
Not this size though.

Does anyone have any recommendation for Taps and Die sizes that are used most
often in tool restoration efforts?
It most likely won't be worth the expense at this time in my life, but I  need
to at least check on it.
Thanks.