Thanks to Dave Dewey for solving the mystery!  Yes, the pump, idler
and motor of my piano are all identical (or nearly so) to the ones
in Dave's piano, and the motor says "Cable", so I'm sure that's it.

My piano's for sale to the highest bidder (altogether, or by the
piece) so please look at Dave's photos, then email me privately if
you're a seriously interested buyer.

Gordon Stelter
tel.: 1-706-351-7817
harmonythump@icloud.com.geentroep [delete ".geentroep" to reply]