Hello,  I am working on a 1927 Steinway Duo-Art model XR that has only
two tube connections on the Repeat switch instead of the four which are
diagramed on the 1925 model chart that I have.

Does anyone have a tubing chart for this model?  The serial number of
the piano is 252926 and it once belonged to Alfred Hertz who was the
conductor of the San Francisco Symphony Orchestra from 1915 to 1930.
Thanks very much.

Jere DeBacker
Denver, Colorado, USA