Reproduction mouthpiece for candlestick or wood wall phones. Has 1" thread for Stromberg Carlson faceplates. The Stromberg Carlson Mouthpiece should also fit on phones for the following types of manufacturers: Baird, American, Eureka, Leich (Coarse), Monarch, Wesco (Coarse), Bucum, U.E. CO. and Canadian Independant Telephones.