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Posted: 10/3/2018 1:43:33 PM EDT
I just bought a M1 carbine with 2 serial numbers one below the rear sight add between rear sight and bolt.
The carbine is a Winchester w IBM barrel.

Any info guys and gals?
Link Posted: 10/3/2018 2:35:56 PM EDT
[#1]
Typical procedure when the new adjustable rear sight obscured the original serial number.  The armorer would then stamp the SN in front of the rear sight.
Link Posted: 10/3/2018 8:04:22 PM EDT
[#2]
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