The first Spider, the Mk1, was a F Junior chassis built by Svenharry Åkesson in 1959-60, it was fitted with a BMC engine and VW gearbox and raced by the designer himself. The Mk2 appeared in 1962 and was a development of the Mk1, in 1963 it was run as a F Junior but in 1964 it was converted to 1-litre F2 spec still with Svenharry Åkesson taking care of the driving duties.
The Holbay-powered Spider Mk3 was a one-off Brabham clone, it was built in 1965 with Svenharry driving and in 1966 it was sold to Börje Björkqvist. The Mk3 was raced in both Scandanavia and Germany.