FOR SALE: 100 kHz CALIBRATOR CRYSTALS...
As used in many radios: KENWOOD, YAESU, Drake, Heathkit,
Hallicrafters, Hammarlund, National.
Frequency Standard 100 kHz TALL HC6/U crystals (HC13/U) made to
highest manufacturing
standards with excellent tolerance to ensure that your radio is on the
frequency
every time. Ideal for all older model tube radio receivers or for
homebrew.
Dimensions: 1.5" X 0.75" - and pins are spaced 0.486" apart.

Also - BFO crystals and filter crystals are available on 455 kHz.
HC13/U Crystals on 100 kHz - $19.00 each.
HC6/U Crystals on 455 kHz - $19.00 each.
Shipping additional. For details see:
http://www.af4k.com/crystals.htm