Ken,

I have experienced this failure before.  The root cause is definitely due to
handling.  The crystal/oscillator is a  fragile component.  It can get damaged
even in tube.  The crystal will crack  when drop  from a distance of 5 inches
to a  hard surface.  My recommendation is to transport these crystal parts in
a foam pads , not in tube and definitely not in bag.  And lastly,  all
operators  from shipping, stockroom, hand load, and PC need to be awared of
handling issue of the crystals/oscillators.

I hope this helps!

Tuan

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