David, it may be the light, but in photo 35, you can just see the ground slightly sharp edges where I think the magazine was scrubbed before being stamped. It's more pronounced on the left side than the right.
The "42" on the barrel would have been Mauser's concealment code.
The size and font of the large "58" stampings do not look like legit dies.
I do wonder if this could have been a DDR rework...
Marc
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 Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.
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