Italian Auto has Bolster-Release Blue Handles

This Italy auto was made after 1960 in which the bolster rotates to lift the backspacing off the blade stud to allow closing off the knife. This is also referred to as a “rotating bolster” or “swivel bolster”. This knife is about 5 inches long when closed and about 8 3/4 inches when the blade is open. The handles are Blue Plastic and on the front of the tang is says: Rostfrie. I think this knife was made by Frank Beltrame for export to Germany. There are no other marking on this knife. There are no cracks at any of the pins on both sides. The blade open up and fires strong when the button is pressed. It locks tight, no wobble. When closed, the blade sits in the middle with no peeking. The lock works in both positions.