The piano on eBay that Bill Chapman refers to is what is referred to
as a Tom Thumb.  They typically have a Recordo system.  I currently
have one under restoration and another waiting it's turn.  Both of mine
use a two-deck Simplex action with a Welte style expression controller.

The pianos appeared to have been branded by several companies, with the
most often seen being Kohler and Campbell.  My other one is a Kramer.
If the plates are marked at all, it is usually with a decal.

Bob Stewart