> Hello all and Happy New Year ~ On behalf of a close friend of mine, I'm searching for a diaphragm retaining ring for the reproducer on his Melville-Clark Apollo player piano/ phonograph. The reproducer is in fine condition, but is missing the diaphragm, gaskets and threaded retaining ring. I can easily help him with the diaphragm and gaskets, but couldn't find anything close to the retaining ring in my own parts collection. The ring would be slightly smaller in diameter than an Edison DD retaining ring, and would have a slightly coarser thread. It's an interesting reproducer with an unusual cross bar arrangement, and still has its original needle set screw (thumb screw) which has a conical jewel stylus mounted in its center, for playing Edison records (I assume), when the tone arm is repositioned for hill and dale reproduction. Any help at all with the retaining ring or letting me know whether this reproducer is common to other phonographs would be sincerely appreciated. The platter appears to be Columbia, but the reproducer doesn't resemble any Columbia reproducer that I've seen. The piano itself is quite a lovely piece, very original and well preserved, and with the nicely engineered spring motor in place of a conventional wind motor, to turn the piano rolls or the phonograph, according to the selector lever. The spring is silently ratchet-wound by pumping the foot pedals, and appears to have an adjustable clutch to prevent winding too tightly. Thanks in advance for any help or insight with the reproducer ring. Andy Baron Santa Fe, NM