This is a knife blade blank made by Tak Fukuta in Seki, Japan for Rigid circa 1980s. It measures 9.25" long overall and the blade measures 4.6" long. Some have the Japan tang stamp on back and others do not. 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.