A while back Bob posted a photo of one of these that had no identifying marks, wondering if anybody recognized it.  We didn't come up with a maker.
Yesterday I found one at a friend's house.  Same four holes in the big gear, same red paint.  But this one had a partial decal on the gear.   Maybe we can tease out the rest of the name. 

In a circle on the decal is "__NAR B. HANSON (top half of the circle), then across the middle:

HAND ball thru DRILL
            bearing

Worchester Mass (bottom half of the circle)

From an ID on Davistown museum for a thickness gage,

""EINAR HANSON" "-TOOLS-" "WORCHESTER. MASS"

...

"Einar B. Hanson was superintendent of the factory established by
his brother, H. L. Hanson (b. 1881) who rented a room and some machinery at No. 54 Hermon street, Worchester, MA, where he
began the manufacture of piano hardware. He expanded and moved to No. 25 Union street. Mr. Hanson was the originator of many
taps and dies (Nutt, Charles. History of Worcester and its people, Vol. 3)."

So, thanks to Rusty, you have your answer, Bob.