American Simplex

Originally the company manufactured a two-stroke four-cylinder 50hp model, later upsized to 6.8 liters and still rated at 50 hp.

In 1910, three open-roof models and two enclosed models were offered, costing up to $5,400; the newly introduced 30/50 hp Toy Tonneau, a long, sleek four-door touring car, sold for $4,300.

The Amplex's most distinctive feature was its valveless motor, which the company claimed would offer more continuous pulling power and greater reliability.

The 1910 models also offered self-starting, a feature that would not be available from major competitors, such as Cadillac, for another year or two.

Yet the firm kept using the two-stroke engine after it had become obsolete; a four-stroke was offered unsuccessfully in 1913.