ORIGINAL: dirtybird
I am a graduate electrical engineer with 50 years of design, test, and systems engineering experience. I also served as the Kraft, Ek, and Royal representative in the Seattle area in the early seventies.
Its true that crystals are cut differently by different manufacturers, BUT, if you put in a crystal in the receiver and it works, then the cut, frequency, and offset must be correct. I would range check it, though, just to be safe.
Are you suggesting that a mere range check is adequate to confirm that the receiver is working well enough to be safe in this situation?