RC 10cm German Lever jigged bone SPRINGER automatic knife with file work

Vintage Sterile 10cm German Lever jigged bone SPRINGER automatic knife with file work most likely made in Germany 1970s or early 80s. The knife measures 10.5cm (4 1/8 inches) closed and 18.1cm (7 1/8 inches) open with brass liners and German (nickel) silver bolsters and lever. The clip blade is 96% full or better and shiny with file work on the spine and no markings on the front tang, but has SC in a circle on the backside. Most likely initials of the person who customized the knife with file work. The dyed jigged bone scales (handles) are very attractive and in great condition. The knife works well with blade tip Deep in the well closed, good snap and Tight lockup open. No rattle if shaken with blade open. Would make a Great EDC.  VG+ condition.