Hi Larry,  I don't have a unit I can give up but I made a sketch of the
unit, from a Mussette in-shop, which I've attached to this letter.
This is the older style unit.  The newer ones have the valve mounted on
the auto-rewind block.

Musically,
John A. Tuttle

 [ John made a nice sketch for Larry.  Jody has placed the image
 [ "shut_off.gif" at the MMD web site:  mmd.foxtail.com/Pictures
 [ -- Robbie