sentences:  The museum has over 150 TV sets including mechanical TVs from the 1920s and 1930s; pre-World War II British sets from 1936–39; pre-war American sets from 1939–41; post-war American, British, French and German sets from 1945–60; and early color sets from 1953-57 including an RCA Victor CT-100.Many of these sets are working.It is the largest collection in the United States.