BLACK MAGIC KOREA 21cm Korean Fixed blade Retracting Guard automatic knife

Interesting fixed blade knife with automatic retracting guard. The guard goes in and out automatically with the button being pushed and pulled while the blade does not move. This knife was made in Korea in the 1980s and measures 21.3cm  (8.5 inches) opverall. The black anodized spear point blade is marked STAINLESS STEEL KOREA. The black synthetic handle insert is marked BLACK MAGIC in silver outlined letters and the knife is held together with three steel pins. The frame appears to be black anodized aluminum. The guard shoots out fully and locks when switch (button/knob) is pushed forward and retracts fully when pulled backward. Works just as it's supposed to. Pretty interesting knife in like new condition.