The barrel length indicates is would be a "standard weight" model like a Swedish model 1640 or US model 3000 or 3100. From the pictures it looks like the stock has either been replaced or the forend has been modified. The 1640 model would have a schnable forend while the the 3000 - 3100 would either a black plastic or rosewood forend tip.
Steve you are the god of Swedish commercial Mausers
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