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So what your telling me sap that a die can not rotate from bouncing or any other way, so an upset error didn't rotate 15 degrees or 90 or 180 or 360 Must be a hullicinating coin then.
What I'm saying is that a rotated die error is very rare. A die clash is also very rare, and is a completely separate event with no causal link: die clashes do not cause die rotation, and die rotation does not cause die clashes. For your coin to exhibit both a rotated die and a die clash, but not actually be rotated itself, we would need the following sequence of events to take place:
- The die rotates,
- A clash takes place,
- The die is rotated back to where it originally should have been,
- Your coin is struck.
That's three improbable events, all having to happen at the same time, and in that order. Possible? Yes. Probable? Definitely not. Occam's razor: when an improbable explanation and a probable explanation both exist to explain something, assume the probable explanation is true.
The probable explanation for your coin: it does not have a die clash.
Well, that overlay is not quite correct, because one of the two images needs to be mirror-inverted (not rotated, but inverted, so the "5" is facing backwards). So if you're looking for a clash on the obverse, the reverse overlay needs to be mirror-inverted. Kind of like this:

Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis