This is the Seaman's Thumb, made in Seki, Japan circa 1980s by Tak Fukuta for Ka-Bar. It features the original Olean, NY tang stamp with stainless steel blade and stainless handle (would normally have been finished with scrimshawed handle scales). Measures 3.25" lock closed with 2" long blade. 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, Ka-Bar, 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.