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In the 1960s we lived just a few miles from the Hathaway and Bowers
showroom and I remember visiting there quite often, especially after
I picked up a 19-1/8" Symphonium on a business trip to England.  It
needed discs, as all that I got with the instrument were badly rusted
and many of the projections were broken off.

I asked if I could borrow some discs of the same size to copy, and was
allowed to take maybe a dozen of them on the condition that I would
also make a copy for them.  I made a punch jig that punched a single
projection at a time, all on a given diameter, then moving out to the
next diameter.  I could punch (copy) a disc in less than three hours,
one at a time.  I still have the punch unit, and have used it only
a couple of times since then.

Owen Christiansen
gingchrist@aol.com.geentroep [delete ".geentroep" to reply]