this is a VZ24 czeck bruno mauser barrel and receiver have matching serial numbers. the odd thing about this rifle is it has been re-bored and rifled to a 9.5MM bore is .376 dia. the serial # has a RR preffix which means it was re-bored and re-rifled at a german arsenal probably after wwII. the bore is dark but deep rifleing. some blueing and no pitting. the wood shows honest wear and is sound no splits or cracks. ask questions and i will try to answer.