Here is an original Bakelite  Stromberg Carlson telephone mouthpiece that would look awesome on your wooden wall telephone or your candlestick telephone. Comes polished. 1" 18tpi 

This exact same mouthpiece also fits:

                                                     Baird

                                                    American Electric

                                                   Eureka -Coarse Thread

                                                   Leich-Coarse Thread

                                                   Bucum

                                                   U.E.CA

                                                Mountain State Electric