Black Eagle Reverse Switchblade w/sheath retracting guard

Here's an unusual fixed blade knife with automatic retracting guard. The guard goes in and out automatically with the button being pushed and pulled. This knife was made in Korea in the 1980s and measures 8.5 inches open. The black anodized blade is marked STAINLESS over STEEL over Made in Korea. The handle is marked BLACK EAGLE in silver painted letters and the knife is held together with three steel pins. The guard shoots out fully and locks, but doesn't return properly. Takes only a gentle push with finger tip to reset it. Pretty interesting knife.