Several years ago Durrell Armstrong published a booklet entitled,
"Player Action Identification".  According to that booklet some
Kreiter pianos used Standard actions and others Simplex actions.
There is also a listing for a Kreiter, K. M. which used a Melville
Clark action.  If it is a Standard action the pedals would have the
large "S" monogram on the pads.  On the other hand it would be a
simple task to identify a Simplex action by the shape of the holes in
the tracker bar.  Rather than being rectangular, they would have the
patented "trapezoid" pattern.

If it is a Melville Clark player action it would probably have a
spring wind mechanism to drive the music roll.  The main spring was
wound by a linkage to the pumping pedals and had a slip clutch to
prevent over winding.  This eliminated the large drain on the vacuum
system otherwise required to run an air motor.  I hope this is helpful.

Howard Wyman