G. Westinghouse & Co. is not an establishment of the fabled inventor/industrialist George Westinghouse, but of his father George Westinghouse Sr. of Schenectady, N.Y. His was a relatively small shop making machinery for agricultural and industrial applications (see 1874 flyer below).
This simple mechanical counting machine is a fascinating example of the transition from craftsman piecework in wood toward use of standardized parts for mass production in metal.
In the pictures above and below, you can see the tens carry mechanism of the mechanical counter, which is a single tooth projecting (out of the page, toward the viewer) from the middle gear at the twelve o'clock position and on the left gear at the three o'clock position. When the left gear next advances by one, it will engage the middle gear and advance it by one also, and this repeats every full rotation (10 steps) of the gear.
A numeral is painted on each gear tooth (on the side facing away from the viewer) so that the proper digit appears in each of the three windows when viewed from the front. A very simple and elegant design.
The partial text on the torn label says:
DIRECTIONS
The Tallier is enclosed in a b...
the Box and Tallier, which pin ca...
for setting at 0. For setting, move eac...
When in use the box will be unlocked and when...
rigid and cannot be moved.
Each time the valve in the elevator is...
will register 1 and from there up to 999 ...
G. WESTINGHOUSE & CO.
H. F. HART PATE...
Below is a flyer from G. Westinghouse & Co. 1874 Schenectady, N.Y.
The company (whose founder was the father of the famous inventor/industrialist George Westinghouse, as noted above) was apparently a market leader in threshing machines and horse powers (which I believe are steam engines with upright boilers on wheels).