Spanish Albacete OTF Aluminum Translucent

Very interesting and not often seen vintage Spanish OTF. The knife is almost cylindrical one piece aluminum frame. Saber grind blade is stamped PAT 96750 over INOX ALBACETE. Scales are translucent and shimmery sort of pearlescent synthetic. Measures just over 4 inches closed and just under 7 inches open. Most likely from the 1960s or 70s. Works Great!