 The 1952 model year included minor changes to medallions, hood ornament, and script nameplates, but after the midyear an optional electric overdrive unit (for speeds over 25 mph) was added for the manual transmission (no automatic transmission was available).The Concord model line was dropped for 1953 and replaced by the Cambridge for the lowest trim level.Plymouth, Massachusetts, was one of the first European settlements in North America and is a major city in the state.