Which automobile company manufactured the car '1960 Electra 225 Convertible' shown below?

Buick (founded in 1903 as 'The Buick Motor Company') is a division of the American automobile manufacturer General Motors (GM). Started by automotive pioneer David Dunbar Buick, it was among the first American marques of automobiles. The Buick Electra is a full-size luxury car manufactured and marketed by Buick from 1959 to 1990. The Electra was offered in coupe, convertible, sedan, and station wagon body styles over the course of its production.

For years, the Super and the Roadmaster constituted the upper echelon of Buick's lineup. For 1959, the Super was renamed the Electra, and the Roadmaster was renamed the Electra 225. The Electra 225 nameplate was a nod to the car's overall length of over 225 in (5,715 mm), earning it the street name "deuce and a quarter."