Bill Klinger wrote in 070126 MMDigest:

> The piano is full upright, Hallet Davis and Co., Boston, USA.  The
> player action appears to be early Standard action.  It does not say
> Standard anywhere but has the typical wavy tracker bar.

This player action is most likely a Simplex as they used the "wavy"
trapezoidal tracker bar holes.  Also, Simplex was a product of the
Hallet and Davis Piano Company so it is likely they used their own
player action.

Bob Conant
Bradenton, Florida