Dwight this non-matching barrel is just an interesting observation and I don't want to dig too deep into it as we won't find the answer anyway. I noticed that the number style is similar so the same set of stamps may have been used and for the rest it's guessing what has happened.
Guisan. 
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Fight to your last cartridge, then fight with your bayonets.
No surrender. Fight to the death.
--Gen. Henri Guisan, Switzerland, July '40
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