1964 Buick Electra (Second Generation: 1961-64)
The Electra, along with the LeSabre, was redesigned for 1961 with drastically shrunken fins.
Buick discontinued the Electra nameplate at the end of the 1961 model year, leaving only the Electra 225 starting in 1962. Buick also dropped the Riviera name as a body style designation after the 1962 model year, shifting the Riviera name to Buick's new personal luxury coupe introduced in 1963.
Automatic transmissions were always standard. The 1959 to 1963 models had Twin Turbine Dynaflow 2-speed automatics (the Triple Turbine was available as an option in 1959) and starting in 1964, they were equipped with the Super Turbine 400 / THM 400 transmissions.
Source: Wikipedia, 2011