Dunkirk NY was the site of the Dunkirk Iron Works. They produced a small geared locomotive, shown above. This was produced from about 1882 to 1885, when the plant went into receivership.
The new company that arose from the ashes was christened the Dunkirk Engineering Company. At about the same time, the Climax Locomotive company had re-engineered their locomotives so much the original George Gilbert patents were not needed. He assigned his patents to Dunkirk Engineering Company, who built units similar to the Class A and Class B Climax. Note that the cylinders are inside the cab, in a "V" shape, similar to a Heisler. About 50 total Dunkirks were built, before the company went under in 1893.
To see a narrow gauge (HOn30) model Dunkirk choose this link.