Sterile 21cm French Derby Bolster BoBc Vintage automatic knife

Sterile 21cm French Derby Bolster BoBc Vintage automatic knife most likely made in the 1960s or 70s. The knife measures 21.1cm (8 5/16 inches) open and 4 5/8 inches open with brass liners, Nickel silver bolsters, safety & lanyard ring and steel button. The flat grind swedge blade is mostly full (about 96%) with most of the factory finish with lots of light scratches from poor sharpening and use that could be removed. The black synthetic checkered scales are in good condition with slight shrinkage and handling marks. The knife works well with the blade tip even with the liners when closed, Strong snap and very good lockup open with almost zero movement at the tip. Safety works. Ex- condition.