Earl Canuck,
First welcome to the forum......
Now a few questions,
Your Stock:
1 Can you see any letter markings in the left side slingwell ?
2 If you measure from the very front nose of your stock to the rear edge, (Front barrel channel) Does it measure just over 4" long?
Rear sight:
3 Original rear sight dovetail: Has the center been filled with metal?
4 Any sign of a Century Arms Import stamp?
5 Look for the P stamped proof mark on your barrel. Your looking for a single punch mark near it that looks like this period = . Any barrel used originally by NPM has this punch mark.
Here are some links with similar markings like on your carbine
U.S. Carbines in Germany and Austria
Click here and go to ODDITIES U.S. Carbines in Germany and Austria
Here look over the BAVARIA (Agency name removed ) CLICK ON THE ARMORYsection:
U.S. Carbines in Germany and Austria
This is an example from the Bavarian agency name removed section:
German Police
The Serrations on the rear sight base (Dovetail) was done to reduce glare after they installed the rear sights farther forward.
The Owner/Operator Jim Mock (our hard working Buddy) gets all the credit for information pulled from his Bavarian carbines site. Upon further investigation you may want to consider E-mailing him to share information about your carbine.
I know you asked about value, but we've got a ways to go to fully understand your carbine. Other than what your parts are worth.
Cheers and Welcome,
Charlie-Painter777