Jeremy George Weston "Jem" Marsh (15 April 1930 – 2 March 2015) was a British engineer, motor manufacturer and race driver, born in Clifton,

Bristol Bristol () is a City status in the United Kingdom, cathedral city, unitary authority area and ceremonial county in South West England, the most populous city in the region. Built around the River Avon, Bristol, River Avon, it is bordered by t ...

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

. He entered the motor industry through his company

Speedex Speedex Castings and Accessories Ltd. was a company manufacturing sports car bodies between 1958 and 1962 in Luton, Bedfordshire. It was set up by Jem Marsh who left Firestone Tyres in 1958 to manage the Luton-based ''Sporting Motorists Agency'' ...

Castings and Accessories Ltd., based in

Luton Luton () is a town and borough in Bedfordshire, England. The borough had a population of 225,262 at the 2021 census. Luton is on the River Lea, about north-west of London. The town's foundation dates to the sixth century as a Saxon settleme ...

, that manufactured and sold tuning parts for Austin Sevens, based on Marsh's successful Speedex750 racing special. Marsh is perhaps best known as a co-founder of the sports-car manufacturer

Marcos Marcos may refer to: People with the given name ''Marcos'' *Marcos (given name) * Marcos family Sports ;Surnamed * Dayton Marcos, Negro league baseball team from Dayton, Ohio (early twentieth-century) * Dimitris Markos, Greek footballer * Né ...

, the name being derived from a contraction of his and fellow founder

Frank Costin Francis Albert Costin (8 June 1920 – 5 February 1995) was a British automotive engineer who advanced monocoque chassis design and was instrumental in adapting aircraft aerodynamic knowledge for automobile use. Career Costin was an engineer ...

's surnames. Founded in 1959, the company was continued by Jem's son Chris Marsh, until it was taken over by Canadian Tony Stellinga, and continued to produce automobiles until 2008 when it ceased production.

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Total Sportscar article
1930 births 2015 deaths British automobile designers British founders of automobile manufacturers English racing drivers 24 Hours of Le Mans drivers English engineers World Sportscar Championship drivers 20th-century English businesspeople {{England-autoracing-bio-stub Sportspeople from Clifton, Bristol