James Harold Atherton was the sole proprietor and works manager from 1903 until 1918.
[1] The 6+1⁄2 hp (4.8 kW) two-cylinder engine was controlled by variable-lift inlet valves.
[4] The Addison tri-car won a silver medal at a hill-climbing contest held by the University of Liverpool Motor Club on 13 July 1905.
[5] In January 1912, it was reported that the company was so successful that they had to open a separate showroom at 7 Berry Street in Liverpool for their Alldays and Phoenix cars.
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