A American-made single-barrel carburetor constructed of cast metal with steel and brass components. The unit features a throttle and choke linkage assembly, a fuel inlet port with brass threading, and an automatic choke mechanism. A black plastic circular cap on the choke housing is embossed with a center adjustment slot, a directional arrow, and the text LEAN and HOLLEY. An identification plate is embossed on the main body with several lines of text: MODEL 1920, HOLLEY CARBURETOR CO., WARREN MICH. The plate lists patent number 2,613,068, while additional patent numbers below it are worn and difficult to decipher; the bottom of the plate reads OTHER PATENTS PENDING.Measurements/notes: Approximately 6 x 6 in.