I have 112.30 kc crystal and I'm curious about what it was originally used
for and what sort of equiptment it was used in. It's in a metal can, like a
short version of a 6L6, with an octal base. It's marked GENERAL ELECTRIC
as well as with the frequency and several other numbers.

I'm vaguely aware that this band is used for some sort of maratime purpose,
but I don't know exactly what.

I hooked it to an audio generator and a scope, and it's series resonant at
more or less the marked frequency.

Frank Dresser