An extract won't confirm if parts have been taken from one watch to another, unless it's the escape wheel bridge with the serial number on it. I think you are referring to a whole movement swap, which is not what was being suggested I think.
It's certainly unfortunate, but not evil in my view to take 321 parts from one watch to keep a much more valuable watch running. If only Omega would supply all the parts for the 321, we would not have to do such things....
Cheers, Al
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