Hello! Just received some items from my father, which were passed to him from his father having served in the Royal Marines and SBS during the second world war. One of which is a Japanese sword which we believe may be an officer's katana. From what we've read though the mass produced WW2 swords had a stamp on the blade amongst other things which this blade doesn't have, unless it's hidden under the hilt (which we can't / don't want to remove). What we do know is it dates back to at least 1945, no idea how much older it may be though. Any information or pointers would be greatly appreciated!
Photos on Dropbox: https://www.dropbox.com/sh/r5mmtuabw...HIwiznU5a?dl=0