Can anyone help me identify this Sten Gun ?

I`ve researched the SECO markings to S/109 Sterling Engineering Co.

But the other that appears to be FG 22392 and somewhat unreadable &S 100 underneath.

The gun can possible be from the Norwegianicon resistance or airdropped from Englandicon during the WW2

Can someone help out a bit ?

Regards Consolidator.
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