I was sure they were plastic/celluloid when I bought this razor to restore. However, after cleaning it up, it stinks like horn. On an aside...I really hate the smell of horn in the morning.... : \ And celluloid too, while I'm at it. Had to sand down a wedge to get a blade to fit and now I have to vaccum up the stuff off my carpet now. I'm not sure which is stinkier, the celluloid or the horn....