Ambassador was an automobile brand produced by the Yellow Cab Manufacturing Company from 1921 to 1925 in Chicago, Illinois. The brand emerged following Yellow Cab's acquisition of the Shaw Motor Car Company in early 1921. The initial models, produced in 1921, 1922, and 1923, were essentially rebranded Shaw cars equipped with a Continental 6-T L-head engine. This strategy was part of Yellow Cab's effort to utilize existing Shaw parts, although…