This is a manual action knife and is not an automatic. The Button is for decoration only and does nothing. The blade opens manually using the thumbnail pull. This is a vintage Japanese crafted pocket knife made in Seki, Japan by Yasuo Imai, circa 1950s. It measures 3" long closed and features a synthetic handle and a stainless steel blade. Yasuo was the father to one of Seki, Japan's finest craftsmen, Seizo Imai. After Seizo's passing, several vintage old stock models were found at his warehouse. This is one of these rare finds.