The original 1950 model year 75 "Cyclops". Note the extra chrome detailing on the earlier Cyclops along with the original number of radiator grille louvres.
The 1952 model year introduced a revised front with a chrome grille along with a wider rear window.
The 1955 model year introduced the enlarged boot and a larger three-piece rear window.
The 1957 model year introduced the revised round top wings.
The 1959 model year introduced revised grilles, bumpers, overiders and a rear number plate shroud was added.