Luger with no date stamp

[Yanik213]

I have no idea what caliber it is, i put a 9m luger in the clip and it seemed to be a perfect fit but again i have no experience in this type of firearm. I don’t think it’s a reproduction from the stamps but i could be wrong, that’s why I’m here trying to get answers. I’m getting conflicting answers so now I’m even more confused lol. I really do appreciate all and any info. Thanks again everyone!