I stupidly omitted some information about the Hupfeld roll. Here's the
complete information on the box label:
Sonata No. 7
a-moll - la mineur - a minor
W. A. Mozart
The leader is completely intact and the markings are consistent with
the box. At the top left of the label "88" is printed in a box. At the
top right, "mQO". These markings don't appear on the leader.
The roll has a series of black dots which alternate from the left to
right side of the roll, generally forming a vertical line about 2.8
inches (7 cm) from the right margin and about 3 inches (7.5 cm) from
the left margin of the roll, but having straight lines that connect
them from one side to the other. I assume they might indicate pedaling.
I assume it's only the first movement since it's marked Allegro. So
here's one strange things, now that I've done a little more digging.
Mozart's Sonata No. 7 is in C major, the 8th is in a-minor. Listening
to a recording of the 8th Sonata and looking at the beginning of the
roll (my only piano is a Disklavier), it's clear to me it's the 8th and
not the 7th! This is even weirder than I'd thought it would be.
I also noticed that in MMD 2009.04.08 that John Phillips was looking
for a copy of Wambold's signature. I'll scan this later in the week and
get it off to him.