The majority of production was for customers in the United States and Canada, but export models were produced for buyers on five continents.

Production totaled approximately 550 units over 33 years, making it one of the most widely produced switchers in American history.

[3] The 25-tonner's small size also allowed it to fit in places where larger locomotives could not, an asset in industrial facilities and yards where clearances were often low.

[4][1] The unusual chain drive system for a locomotive was part of the reason for its top speed being limited to 20 mph (32 km/h).

[7] Throughout the locomotive's long production history, minor changes were made to its shape and the location of features, such as the bell, exhaust pipe, and lights.

[6] Many customers made modifications to their 25-tonners after purchase, ranging from minor changes such as moving the bell to completely replacing the prime mover and adding an independent brake.

[9] 25-ton switchers were for many years a very common site at rail-served industries in need of small, cheap locomotives capable of switching cars around the many sidings found on their properties.