[1] On the death of the founder, Thomas Jeffery in 1910, his son Charles took over the business.

[1] Nash Motors went on to become Nash-Kelvinator Corporation, in 1954 merging with Hudson to form American Motors Corporation (AMC), finally bought out by Chrysler in 1987 and becoming the Jeep-Eagle Division of Chrysler.

The Jeffery Six (called the Chesterfield Six in 1915) was a 48 hp six-cylinder car on a 128 inch chassis.

The cars were moderately priced from $1,550 to $1,950, (equivalent to $58,731 in 2023) and came in open or closed body styles.

[2] Located in Milwaukee, Wisconsin, Seaman was 50% owned by the Jeffery Company and it also supplied bodies for other automakers as well as for trucks, buses, and ambulances.