My 5'8" AR Mason and Hamlin Ampico has a serial number of 33089.
Molded into the plate is "AX6".  The existing Mason and Hamlin records
show this as having been shipped to the Cable Music House in downtown
Minneapolis, Minnesota, in October of 1924.  This is a very early Mason
Ampico; it may be the oldest known one still intact.  The records show
it as a CAR (the number in the piano says AR) and it is my understanding
that this meant that the piano was modified to accept the Ampico.

The Ampico has right side up valves with push rods.  The pedal lyre has
been visibly modified and the tension resonator has fewer spokes.  If
this adds to the discussion, the piano is original, it will hold tune,
the sounding board still retains its crown, and the bridges etc. are
fine.  That being said, it deserves a castor up restoration which it
may or may not get.

Randy Hammond