Bill,  For a customer a couple of years ago I removed the steamboat
pump and the apparently original motor from a ca. 1917 Weber Duo-Art
upright, where the stack and upper player components had already been
removed by some previous owner.  The motor was indeed

  Electric Specialty Co. Stamford Conn.
  Type B113 No. 30650 / Volts 110 Cycles 60
  P.M. 1750 / HP 1/4.

Other than me reading the rpm as 1750 rather than 1150, it seems to
match the one you were given, including the fact that the windings
all appear to be in the motor casing rather than the armature.

The mounting was fairly simple, with the motor mounted onto a
horizontal board roughly 6.75" by 10", with a thick strap-leather hinge
on one short side to a mounting block positioned I believe towards the
back of the piano near the treble end, a sewn leather tensioning strap
on the other short side toward the front, with a threaded eye-hook and
wing-nut adjuster, along with a couple of holes in the board through
which screws lined with felt bushings passed through into the piano's
bottom board but were not tightened, so that acted as guided to keep
the motor located but allowed it to float between the leather hinge and
tension strap.

The double pulley on the motor shaft is ca. 1-7/8" diameter, which ran
two belts to the ca. 9" crank on the pump, which then geared down with
with a similar ratio through another set of 4 belts to the main pump
camshaft.  I would be happy to send pictures if you need them.

Ralph Nielsen
http://www.historicpianos.com/ 
historicpianos@gmail.com.geentroep [delete ".geentroep" to reply]