Springer 20cm Japanese Shell Puller Lever Bone & Brass vintage automatic knife

Vintage Springer 20cm Japanese Shell Puller Lever Bone & Brass automatic knife made in Japan in 1950s or 60s similar in style to the German made Johnny Cade knife from the Outsiders movie. The knife measures 19.9cm (7 13/16 inches) open and 4 3/8 inches closed with steel liners and brass bolsters, lever & pins. The clip blade appears to be 98% full, or better with heavy patina, spotting and light pitting with no markings that I can see on the blade. The dyed jigged bone handles (scales) are in very good condition and the bottom bolsters is stamped SPRINGER. The shell pullers do not line up properly and are not functional, just decorative. The knife works well with blade tip deep & centered closed, strong snap and tight lockup with just a hint of movement at the tip. No rattle if shaken with blade open. VG condition.