This is an unmarked factory sample prototype of a Frost dagger, made in Seki, Japan by Tak Fukuta circa 1980s. The handles are colorful dymondwood and surgical steel blade. Sheath is a synthetic material. Tak Fukuta was the first Japanese member of the American Knife Maker's Guild, and apprentice to Bob Loveless. He hand crafted fine quality knives that impressed his mentor. Over the years, his factory in Seki, Japan also produced knives for Parker, Valor, Gutmann, Explorer, Frost, and Browning among others. After his passing, several vintage old stock models were found at his warehouse. This knife is one of these rare finds.