To answer Mike Carey:  Sometimes there is a penciled number (usually 4
digits) at end of roll after the rewind slot.  Either unwind the roll by
hand which is risky with the brittle paper or turn the machine off at the
end of the roll just before going into rewind and unspool the roll past
the slot to see if there is a number (also tricky).  If you find a
number, E mail or call me and I will send you the tune numbers and tune
titles of the roll.

If the roll number is after about #1800, it is a so-called late style
roll and will work on a majority of Violanos.  Actually, if it is any
Violano roll it should play on most any Violano (with some minor
performance problems if earlier than about #1800 on a late style machine
or later than about #2800 on an early style machine).  The machine
differences are piano expression and damper lock and cancel on early
machines, and no piano expression and standard damper lift on late
machines.  Many rolls between 1800 and 2800 have both long perforations
and also cancel perforations so they will work both late and early
machines.

If there is no roll number, I know of no way to determine what is on the
roll other than listening to it.

Dick Hack