So what makes this a limo? Looks just like a checker to me? Should it have a division window or something else makes it a limo, wheelbase etc? Thanks
At the time of this car's construction and lasting until the end of Checker production, Checker produced what they considered two different model lines, and A-11 and the A-12. The A-11 were cars built for the taxi market, the A-12 were cars named Marathon for the civilian market. Both the A-11 and A-12 were practically identical and rode on a 120 inch wheelbase. These cars could seat eight, three on the front bench seat, three on the rear bench seat, and two on a pair of single-person jumpseats. The jumpseats were angled rather than facing forward in order to give the person in those seats legroom.
Checker also produced the A-11E and A-12E models at the same time. These were essentially the same car but rode on a 129 inch wheelbase. The 'E' in the model designation literally stood for 'extended'. These cars also used 9-inch longer rear doors, so the cars externally continued to look like an ordinary sedan rather than like any type of lengthened car. On the inside, the difference was mainly a two-piece jumpseat that formed a third full-width, forward-facing bench seat giving the cars a nine-passenger capacity.
The E-models, as Checker called them, were available both with and without a divider, making the car available as either a formal limousine or a nine-passenger sedan, but Checker called the E-models limousines whether the car had a divider or not.
Many, but not all, of the civilian market E-models received luxury touches such as plusher interiors, chrome trim, vinyl tops, and Lincoln-like oval quarter windows.
By the mid-1960s, Checker was making active attempts to branch out from their taxis-only image, with the E-models being part of that attempt. Other vehicles that met with varying degrees of success were the Aerobus, Convoy, Medicar, police cars, and station wagons to name a few. Checker even looked into the factory-built ambulance market a couple times, and even built one prototype, a converted station wagon, but ultimately they never attempted that market.
The civilian version of the E-model had some popularity with the US State Department for use at embassies around the world where there was concern that the Cadillac Fleetwood 75 would be too flashy.