R-136d COLUMBIA Grafonola REPRODUCER, small 2 1/4″ diameter. Original, cleaned and overhauled. New white tubular rubber gaskets, original diaphragm. Last photo shows the reproducer attached to a Columbia Grafonola tone arm. Because of the lack of markings, it is also possible that this reproducer was used by other phonograph companies using the same back groove/lock system. Interesting that this reproducer also has unusual stylus bar tension springs.