George,  To the best of my knowledge, Seeburg used the same gears and
transmission system in _all_ models of Seeburg coin pianos.  I have
a "G", which is the second largest, and an "L", which is the smallest,
and the drive system is interchangeable.

Over the years there were some changes in the valves and the type of
bleed used, as well as a mechanical latch or lock and cancel to hold in
reverse, but the unit was still the same physical size with the same
gears.

Player Piano Co in Wichita, Kansas, used to carry the replacement gears.
Now you will have to get one made.  I would also check with Don Teach
in Shreveport, Louisiana.  He may have some or could make one for you.

As for instructions, there is a basic tuning pamphlet for orchestrions
with pipes that also applies to all machine models with pipes.  That
you have a tuning/testing roll for the "H" should give you great help.
Adjusting the balance of sound, something very critical in orchestrions,
comes from a good ear and musical knowledge, etc.  A piano that is too
loud or drums too loud can really spoil the sound.

The Edison player will be great fun to restore but beware of "pot metal
disease."

Best of luck,
Ken Vinen, Aylmer, Ontario, Canada