Former owners long time pocket pal, it is a 1917 to 1930's pattern . It is 2.25” closed German made in Solingen Germany with Great Snap open assisted brass release, powered by coil springs, very unique like an antique pull ball. blades are razor sharp, it is lightly used, both blades stamped , file has the D.R.G.M trademark, used from 1917 to 1939, and the blade is marked Solingen , from Germany, in excellent condition everyday use. This was a pre-war souvenir from Niagara Falls.