This one is a recent estate purchase. Fresh original survivor in sound  condition.......... . ..................This lot includes original vintage horn assembly, relay, bracket, &  horn  with all screws and insulators for Lionel  Alco Diesel 2031 and others.   works great. It will work on others of this series as well,   2033 2032 2023 diecast base alcos. Clean all contacts and battery surfaces before using. Tested but these are always fussy and contact areas need to be real clean.