Stainless 15cm Japanese Rizzuto style Step bolster bayonet blade automatic knife

Vintage Stainless 15cm Japanese Rizzuto style Step bolster bayonet blade automatic knife made in the 1960s in Japan. The knife measures 14.9cm (5 7/8 inches) open and 3 5/8 inches closed with brass liners and nickel silver bolsters & safety cap and steel button. The bayonet blade is 98% full with original finish and some light scratches and is marked Stainless in script below the spine. The synthetic onyx scales are in very nice condition and held on with brass pins. The knife works well with the blade tip deep when closed, good snap and good lockup with a little up and down at the tip that springs back if you let go. Safety works. VG+ condition.