[ Karl Schroeder wrote in 151018 MMDigest:

> I am looking for an A415 Hz piano tuning fork made in the
> United States or Germany.

Probably the best possibility for a 415 Hz tuning fork is an
adjustable one.  I suspect that a search for an adjustable tuning fork
on the Internet would turn one up.

I have one left over from my teaching band and orchestra long, long ago.
It has been fun to use it to record the pitch of music box scales.

Beatrice Farmer