Buick is the oldest actively producing American brand of motor car. Today it is a part of General Motors, but it originated as the Buick Auto-Vim and Power Company in 1899 and was incorporated as the Buick Motor Company on 19th May 1903 in Detroit, Michigan by David Dunbar Buick. Later that year the then struggling company was taken over by James H. Whiting who moved production to his hometown of Flint, Michigan. The first Buick made for sale was the Model B in 1904 and by the end of the first two decades of the 20th century Buick was the largest car producer in the United States having purchased a number of other brands to form General Motors. Of the brands that comprised General Motors at the time Buick was the second most prestigious, with only Cadillac being considered more exclusive, and was targeted towards the comfortably well off.
Given that the Buick here is described as “faded” it is likely a late Edwardian model as opposed to a new 1920s one.