Different player action manufacturers used different kinds of leathers
depending on the type of valve.  For example, the inside valve on a
Standard Action (SA) seats on metal.  This is usually a very smooth
leather.  The outside of the SA valve seats to wood and this is a soft
suede leather.  Some actions use a very thin leather such as pouch
leather in order to have the correct valve travel.

Then there is leather for the flap valves.  In some cases I glue
leather to a strip of pump cloth for these valves.  I used to go to
the Tandy leather store and pick the leather that fit my needs.  I
have also gone to the wholesale shoe supply house and found leather.
I don't mind the colors anymore except on pumps.  I prefer black
leather on the pumps.  I don't cover all pumps in leather, only the
motorized pumps in coin pianos.

Don Teach, Shreveport Music Co
1610 E. Bert Kouns, Shreveport,  LA  71105