I have a player stack for a 41-note organ.  It has a large metal
valve unit that is held to a individual pneumatic by four small
screws.  The units are then held to the main stack board with three
small screws.  Does anybody know what organ this fits?

Bob Stewart

 [ It might have been removed from a circus organ like
 [ a Tangley Calliaphone or Wurlitzer Caliola.  -- Robbie