Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 132,938 pages of information and 210,195 images on early companies, their products and the people who designed and built them.
Seal were motorcycles produced from 1912 to 1924 and from 1930 to 1932 in Hulme, Manchester.
1913-1917 For a list of the models and prices of motorcycles see the 1917 Red Book
Between 1912 and 1924 a very unusual machine was listed. It was classed as a three-wheeled Sociable and was a special form of motorcycle with a sidecar that had been widened to carry both driver and passenger, while the mechanics were open to the elements. It was powered by a large V-twin JAP engine with a three-speed gearbox. Both were mounted in a frame built from straight tubes clamped together and the front suspension was a type of leading-link with the forks connected to a steering wheel in the sidecar. It appears not to have been listed after 1924.
1930 A commercial version appeared. The driver had a small open-topped cabin that allowed the whole of the sidecar to be used as a goods carrier. Called the Progress, it was revised during the year.
The newly designed Seal had a central front-wheel and became known as the New Progress.
1932 A very strange-looking carrier appeared. This had its 680cc JAP engine mounted above the front wheel, which was driven by chain via a three-speed-and-reverse gearbox. It's unconventional appearance meant that it was not a success and it soon disappeared from the market.
Progress was a motorcycle produced in 1930, in Manchester.
This was the name used by Haynes and Bradshaw for their strange three-wheeler, after a revision and the appearance of a commercial model. In order to increase capacity, the driver sat on the machine rather than in the sidecar.
The company only used the name for a few months.