The 10hp was a car built by Deemster between 1920 and 1922. It is not know how many were built.

The 10hp used a 1082cc 4 cylinder water-cooled engine of the company's own design. There was a gear driven oil pump. The engine had side valves and was connected to a three speed gearbox via a cone clutch.

The chassis was 7ft 7in or 8ft long and had semi-elliptical leaf springs on the front and quarter-elliptical leaf springs in the rear. Extra stability was given to the rear wheels by stay rods and a tie rod.

The body was available in a two-seater or four-seater and cost £475 when new.