This is a vintage Excalibur folding liner lock pocket boot knife, made in Seki Japan by Tak Fukuta for Shelham circa 1980s. This is identical to the Parker folding boot also made by Fukuta. It measures 3 7/8" long closed and the 440C stainless steel blade measures 2 3/4". Marked "Excalibur", a brand of Shelham of Australia. This is old stock found in the original factory in Japan. Among the blemish ranges are: ( B) tight blade when opening because blade is too tight between bolsters making it difficult to open, (C) blade opens too easily from closed position and slightly rubs liner when closed but locks open tightly, (D) blade clicks when opening due to linerlock rubbing on stud screw and slight up down movement when locked open and light staining, (E) blade is too tight between bolsters making it difficult to open and linerlock just slightly goes behind blade, (F) blade opens too easily from closed position and tight blade when opened because blade is too tight between bolsters also has small crack center pin. The price will vary depending on condition. 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.