For parts, display or repair. Found still mounted to an old large base cast iron date washer arm and large heavy base assembly. Will be listing that separately. Cup appears to have the hex shape threaded entry hole on it. The cup date print is deeply stamped with the center keyhole to the left when facing the print. Cup back has one small dent. All the threading is fine no damage. Has it‘s original small brass screws not jimmied. Also has the original hard black wire entry grommet. I believe this is quite a rare early transmitter with the tag stamping of only Western Electric Company. Only cleaned with non abrasive automotive chrome cleaner and a cotton cloth. Auction listing only. No Buy it Now option will be offered.