I bought a small model two "boot knife" out of the Randall showcase in the early seventies. The handle was called ivorite, and it was absolutely Snow White. By the nineties, the handle was yellow , and seems unchanged since then. I gather that it was made from Westinghouse micarta. The Randall folks have advised me not to tamper with the handle, by rubbing, scrubbing, or whatever, in an attempt to restore it to pristine white, as that will do nothing but harm whatever value it has.