Wow, thanks, folks.  I have gotten so many nice notes from folks
reminding me of the purpose of those little pneumatics.  I even got
a phone call from my old friend Bill Flynt.  Great to hear from him and
all of you.  I knew I could probe this mine of information and strike
gold fairly quickly.  I realize now that these pneumatics are on these
two pianos that are both from 1927.  My other instruments are either
younger or older than that.

Thanks again,

D.L. Bullock
www.thepianoworld.com
St. Louis

 [ In 1927 Ampico also began coding rolls for the forthcoming model
 [ 'B' reproducing system which employed sustaining pedal compensation.
 [ Descriptions of the Ampico B intensity control system and the
 [ loud pedal valve block are at the MMD Tech site, at
 [ http://mmd.foxtail.com/Tech/Ampico/index.html  -- Robbie