Koniec produkcji samochodów. Powstało 900 szt kabrioletów Jupiter, w tym 75 podwozi karosowanych na zamówienie.
Jowett Jupiter R4 was revealed at the 1953 Earls Court show, by which time Javelin production had ceased owing to difficulties with the supply of body shells. Although the overall design was totally different from the Type IA, the power units used were very similar. The car had a broad squat two-seater body shell, with a wide oval grille, fitted to a deep box-section chassis frame. Only three cars were ever made. The R4 was the last car to bear the Jowett name, for production finally came to a halt in 1954.