Commonwealth [2] (United States) - AllCarIndex

Commonwealth Motors Company was an American automobile manufacturer based in Joliet, Illinois, that operated from 1917 to 1922. The company emerged as a successor to the Partin-Palmer Company following its reorganization. Commonwealth focused on producing a range of vehicles, primarily featuring four-cylinder engines sourced from Herschell-Spillman and Lycoming, along with a six-cylinder model known as "The Victory Six," which was available exclusively in 1919.

In its early years, Commonwealth's offerings consisted solely of open cars. However, in 1921, the company expanded its lineup to include the Model C-44 sedan and a taxicab variant, also designated as the C-44, which was later rebranded as Checker. This diversification marked a significant shift in the company's product strategy.

In November 1921, Commonwealth Motors merged with the Markin Body Corporation. Following this merger, the company streamlined its offerings by discontinuing all body options in favor of the taxi model, which continued under the Checker name. By the time of the merger, Commonwealth's 1922 production was limited to the taxi, with only a few units completed that still bore the Commonwealth name before the transition to Checker.