he 1940's began and ended with NYPD radio cars painted green-and-white with “POLICE” lights on top, but in between it was another story. By 1942 the roof lights started to disappear, possibly because cars ordered during World War II served as “blackout” vehicles, or perhaps because materials to equip department cars were in short supply, or simply because new vehicles needed to be sent out on patrol as soon as possible, minus extra paint work and equipment. But by the end of the decade the "white tops" and “POLICE” lights had returned. Shown above is a 1941 Plymouth radio car from the 18th Pct.
Photo Courtesy of Police NY Website.