Long
This one has a reciever #L581, not a series he's seen before. The reciever is also flat topped, not dovetailed for a scope. The bottom of the stock is not inletted for a floorplate. He says that the 75 mag fits perfectly but it's just one round too tall.
He's wondering if it's a European model someone brought over rather than one manufactured for import?
Wayne the Shrink
There is no 'right' that requires you to work for me or me to work for you!