Identify Stock/metal marking on my Underwood Carbine?

Rebuild Underwood that has the below marking in the sling opening. It is refinished but would like input on the mark if possible. There are no import marks on the gun but there are some numbers stamped on the left side of the receiver, the bolt has no makers mark I can find but has a letter s and number 6 or is it 9 S?

https://www.milsurps.com/images/impo.../zc13gmY-1.jpg
https://www.milsurps.com/images/impo.../vElg574-1.jpg
https://www.milsurps.com/images/impo.../ovrknA9-1.jpg
https://www.milsurps.com/images/impo.../6gbIknM-1.jpg
https://www.milsurps.com/images/impo.../35AQ2hr-1.jpg
https://www.milsurps.com/images/impo.../mOks4Zc-1.jpg
https://www.milsurps.com/images/impo.../4CE4lVk-1.jpg

Looks like it's a 'Bavarian' - a reimported carbine that was issued to various police and border guards units in Germany and Austria after WWII.

Thank you. I thought that as well but there are no bavarian stampings in the receiver like most I have seen and there are no import marks on the gun

https://www.milsurps.com/images/impo.../jkwDgyq-1.jpg
https://www.milsurps.com/images/impo.../5PS1cnA-1.jpg
https://www.milsurps.com/images/impo.../sf7i0KC-1.jpg

Quote:

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Originally Posted by INLAND44

Looks like it's a 'Bavarian' - a reimported carbine that was issued to various police and border guards units in Germany and Austria after WWII.

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Bolt is a Standard Products.

Slingwell marking is The stamp of the Bundesministerium der Verteidigung.

See your stamp here:
Strange Stamp

The receiver number looks to have been stamped by the Bavarians.
Search this link:

Bavarian M1 Carbines (Post WWII M1 Carbines in Germany Austria)

HTH,
Charlie-Painter777

Amazing guys, thank you so much