On the exterior of the Superba, the grille was composed of an arched center section, flanked two-chrome wings; engine compartment ventilation was through 24 rectangular sections located in the center of the grille.
When the Checker Marathon was introduced in the fall of 1959 it was only marketed in New York and the states of New England.
In 1962, the Superba received its only exterior change, a more sculptured front bumper raised up several inches.
Morris Markin formed the Checker Cab Manufacturing Company in July 1922 by merging two prior acquisitions: the Lomberg Auto Body Manufacturing Company (acquired 1920) and Commonwealth Motors (1921).
Commonwealth sold the Mogul Taxi between 1918 and 1921, which used a body by Lomberg on a Commonwealth chassis; Checker continued Mogul Taxi production through 1928 with minor changes as the Models H, H2, E, F, and G.