Keith, Sounds to me like the piano at one time had a player mechanism. If there are no other indications undr the piano for a player installation, then you may have had a push-up player,made by Hupfeld, Apollo, Angelus, Aeolian, etc. If there is evidence under the piano of a player having been built-in, then these plates may have held the slide out drawer. It they are all at one end, then it may have held a Hammond Solovox. Ed Hilbert
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