NoahTge

Do you know anything about the number that happens to be on the nakago?

My family has this Japanese sword and I'm curious about it's origins. The thing I'm most curious about is why there is no signature on the nakago. Also why there is a number on it as well. Here's the pictures: https://imgur.com/a/e1SYl, https://imgur.com/a/sg2ao There also seems to be feint scratches on the nakago. EDIT: If you need anymore pictures just ask