I saw a Belgian Mauser with a .30/06 18" barrel today. Everything looks original, not cut down from something else. The 3rd edition of the Standard Catalog of Military firearms shows a FN M30 Short rifle built by Belgium after WW2, but states a 23.3" barrel. The outside is fair, with almost no finish and a dinged-up stock and cracked (not all the way) handguard. The finish on the front receiver ring is worn from carry and so is the adjacent handguard. The rifling and chamber are probably the cleanest and sharpest I have ever seen on a military rifle. There are 2 sling attachment points at the front of the stock, one on the bottom and 1 on the side. The rear swivels.
What is it and what is it worth?