Produced in Mardsen by Richard Wylde between 1920 and 1924. It was a lightweight machine with a belt drive and a diamond frame.
Grace's Guide reported that 'he was a small producer who did not appear at the big shows or on the lists and he entered the market with one basic model powered by his own 269cc two-stroke engine offered in two forms of transmission. In 1921 a Sturmey Archer gearbox was an option as a two-speed racing model'.
In 1924 a three-speed Albion gearbox was a further option.
The Motor Cycle Magazine, dated 25th March, 1920, carried an illustration of the Mountaineer.