Do you know why it is unmarked?? We are talking 25+ years ago so info was sparse from my buddy's memory and he could not tell me. He also thought it was one of his first but obviously he was wrong. Thanks for the heads up DW.
Always a wealth of knowledge you are! (STARWARS PUN INTENDED) LOL.
The knife you show is a (newer) Vero Beach Industries mini UDT and not the vintage. They are great knives to use but not much collection value. Here's a pic of some early (four from 94 and one from 1/95) UDT's for comparison