R-81 KenTone REPRODUCER

R-81 KenTone REPRODUCER  Original, cleaned and tested.  Much of the ‘gold’ is worn, as shown in the photos.  The back opening is 11/16″ diameter.  Such a reproducer is usually used with Edison Diamond Disc attachment tone arms to play commons 78s.  The back has a screw (new?) to hold the reproducer at a recommended 60-degree setting to a record.