After putting this crystal in my test oscillator and seeing 9.xxxMHz, I can assume the crystal is intended to operate at the third overtone. A bit of reading online suggests that the extra response at 27.165 and so forth are spurious by-products of other vibrational states, so I shouldn't need to be too concerned about that, I hope. Yes both were almost identical.Boy it's nice to see this...
You folks are cool - good to know my "rants and chants" are not wasted.
It's good to know you have a Nano - you even use that as your generator.
In doing a little math, the difference between the 27.125 and 27.165 = 40kHz - so the crystal can be "pushed" (meaning "heterodyned" even Zero-beated) - with an external signal.
Might indicate damage to the Xtal - lattice - do both do the same thing?