Your rifle is likely a Fabrique Nationale rebuild. After WWII, the US contracted with FN in Herstal,
Belgium
, to rebuild several hundred thousand rifles, probably all those that ended up in Europe. The contract ran from 1946-1949.
ALL rifles were completely stripped. Parts were inspected, & those serviceable were put in huge bins. Starting with the bare receiver, rifles were rebuilt with a combination of used parts & new parts from SA. For obvious reasons, a LOT of wood had to be replaced.
Your rifle made a subsequent trip to
Denmark
, then came back to
CMP
as a "Danish return".
There's no way to definitively identify an FN rebuild, definitely no stamp on the stock other than a proof P. Identification is done by the detective work you have done: a WW2 receiver with post-war parts, none later than 1949.