This is a rare, small-sized N-3B. I'm selling it because I've been wearing down jackets more often. N-3Bs usually only come in larger sizes, but the S size is quite rare. I'm 167cm tall with a standard build, and it fit me perfectly. The mil-spec label is still intact, and it's from 1984. There's a tear in the lining, but it doesn't affect wearability.