The Lionel 2046W and 2671W Working Whistle Motor & Relay Assembly is a vintage model train accessory manufactured in the 1950s. Designed by Lionel, featureing a multicolor design and operates on a three-rail system. The whistle motor and relay assembly is ready to go and perfect for collectors or hobbyists looking to enhance their model railroads with an authentic touch of transportation history. Made in the U.S.A., this analog-controlled system is a must-have for enthusiasts of O gauge model trains.