Sterile 21cm Spanish Fishtail Black Rectangular button vintage automatic knife

Sterile 21cm Spanish Fishtail Black Rectangular button vintage automatic knife made in Spain 1960s or 70s. The knife measures 20.6cm (8 1/16 inches) open and 4 7/16 inches closed with aluminum liners, button & safety. The flat spear point blade is 99% full or better with original finish with light scratches & scuffs and no markings on the blade. The black synthetic (plastic) handles (scales) are in good condition with lots of light scuffs/handling marks. The knife works well with blade tip below liners closed, strong snap and good lockup with about 1/8" up and down at the tip. Rattles if shaken with blade open. Safety works. VG+ condition.