z Saut Ouvert 24cm vintage French automatic knife

Nice old French Saut Ouvert switchblade knife, I thought, but not sure. I received information from a reliable source that this knife could be a Spanish copy of the French Saut Ouvert knife? The knife measures 24cm open (9.5 inches) with steel liners. The blade appears to be full and shiny with original blade finish. No visible markings on the knife. The black synthentic scales are in good condition with no shrinkage, or cracks. The knife works well with the blade tip sitting even with the handles, strong snap and nice lockup open. The sliding safety works well. Nice old switchblade.