The top valve seats [in Coinola instruments] were usually a red fibre
that can be obtained from McMaster Carr.  Cut them with a hole saw for
the outside dimension.  Take a stack of them and chuck them in a lathe.
Drill then tap.   Yes there will be waste but you can make enough for
what you need.  I assume these are the ones with the brass insert.

Coinola also made these with a Bakelite top seat that I have made by
taking an original and making a mold with RTV rubber.  I then used a
product called Aluminite that is a two part epoxy that sets up in a
minute.  These can be spray painted black.  I have a couple of both
types left if Tony wants to see them.

We are an Aluminite distributor.  Being somewhat cheap and stingy
I have bought Hold Heet glue pots direct in quantity, Forstner bits,
Osborn punches, and Aluminite.   Using the RTV molds I have made all
kinds of parts for players such as the moldings on the top of KT post,
valve covers, and parts that I wanted to have cast in iron by a
foundry.

Most recently I cast all the iron parts of a Nelson-Wiggins so that
they could be made into two part patterns for the iron foundry.  This
also enabled me to make them oversize for the iron shrinkage.

Don Teach
Shreveport Music Co.
318 798 6000 voice     318 797 4572 FAX