Background
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Frank Costin made his name helping develop one of the most effective military aircraft of the Second World War, the de Havilland Mosquito. Built from wood to avoid the metal shortages that besieged Britain at the time, it was so fast it didn’t actually need any defensive armaments, as nothing could catch it.
After the war Costin formed a new company in 1959 with fellow engineer, Jem Marsh, the two men using the first three letters of their surnames to come up with the name – Marcos.
With Marcos, Costin applied lessons he learned while working on the plywood Mosquito fighter/bomber and the men developed a 386-part plywood chassis for the new car that was bonded together to form a complex, rigid, and lightweight three-dimensional shape.
It was fitted with a glassfibre body, a four-cylinder Volvo B18 Amazon engine with an overdrive gearbox, independent front suspension, and a De Dion rear end.
However, while plywood might have been relatively cheap it required significant man-hours to bond it all together.
As a result, the company soon developed a welded steel box section chassis with some changes to the internal body structure to match, so later models had a steel chassis and commonly Ford engines although others were also available. The majority were sold in kit form.
The car was out of production between 1972 and 1981, when small scale kit production recommenced. The original GT continued to be built until 1990, being developed into its altered Mantula form. This was further developed into more powerful and aggressively-styled designs, culminating in the 1994 LM600 (which competed in the 1995 Le Mans 24-hour race).







