I have inherited this gun, and me and noone I know has any idea what type it is or what caliber. A couple parts are missing, there is a band that goes on the end of the barrel to hold the front of the stock on, and the but stock plate is missing. All the writing on it is in what I am guessing to be japanese or chinese. It needs to be restored but if it's not worth my time I'd like to know, and I can;t buy parts until I know what it is of course. Thanks for any help you can provide in advance.