Collini Flylock 20cm Italian automatic knife

These are usually called Collini Flylock knives and they were made in Italy, but not sure when. I would guess 1970s. The knife measures a little under 20cm (8 inches) open and steel liners are inside the wrap around black plastic handle. The blade appears to be full with all of the original factory finish and is marked ROSTFREI PATENT. The handles are in good condition with some light scratches from handling. The knife works great with the blade tip seating deep in the well, strong smooth snap and tight lockup. The blade is thrown open by a spring loaded knob in the blade well. Neat design and would make a good EDC (every day carry).