This is a quality vintage butterfly knife, handmade in Seki, Japan, circa 1980. We believe this was made at the G. Sakai factory, where Pacific Cutlery balisongs were also produced. The quality of this knife is excellent, as are the other balisongs we have that are stamped "Handmade by Kim". If you want a practice version for one of those, this is a great choice. It features a 440 stainless steel blade and a 5" long handle of solid machined nickel silver and has great feel to it and is heavy. This is a nice butterfly knife and a scarce addition to any knife collection.