Related threads: Mercury Comet Rallye Car
Very Brief Overview
The Mercury Comet was an automobile produced by the Mercury division of the Ford Motor Company between 1960 and 1977, with the exception of the 1970 model year. Originally planned as an Edsel model, the Comet was not officially a Mercury until 1962, and was simply marketed in 1960 and 1961 as the Comet.
From 1960 to 1965, the Comet was based on the Ford Falcon platform and marketed as a compact car. 1966-69 Comets grew in size and were based on the same chassis as the Ford Fairlane intermediate-sized car. During that period the Comet name was used only on the base models, upper lever models were now referred to by what had previously been their subseries names, like Capri, Cyclone, Montego etc.
For 1971, the Comet name was revived on Mercury's version of the Ford Maverick compact car. The model was offered with comparatively few changes through the 1977 model year, and was then discontinued to make room for the new Mercury Zephyr for the 1978 model year.
source: wikipedia.org