Button shows red and blue lettering on a white background. Blue Chevrolet logo with white lettering is at the bottom.
IMBER QUALITY PRODUCTS L.J. IMBER CO. 1725 W NORTH AVE CHICAGO, ILL
Chevrolet issued this button in 1945 as a way to help sell war bonds and promote its cars. C-Day, or Chevrolet Day, advertised that automotive assembly lines would soon be returning from war production to regular use after the end of World War II. An ad used in the same campaign read "Chevrolet Speaking - When C-Day comes...when new Chevrolets roll off the assembly lines and new automotive values again attract America's interest...Count on the Leader to Lead Again!"
Automotive and other factories switched almost completely to making war materials during World War II. In 1941, the USA manufactured more than three million cars, but only 139 were made during the entire war. Overall, American factories produced 297,000 aircraft, 193,000 artillery pieces, 86,000 tanks and two million army trucks for the war effort.
Source: WETA, et. al. (2007). At Home: War Production. Ken Burns' The War.
Source: Chevrolet (1945). Chevrolet print ad for war bonds listed on Amazon.com.