Rostfrei 4 (slant) 20cm Italian BoBc Stiletto 1960s vintage automatic knife

Vintage Rostfrei 4 (slant) diagonal 20cm Italian BOBC horn handled automatic knife made in Italy in the 1960s or 70s. The knife measures 19.7cm (7.75 inches) open and 4 3/8 inches closed with D stamped brass liners and nickel silver bolsters, button & safety cap. The flat swedge blade is 100% full with original finish and the ricasso is stamped Rostfrei 4 diagonally on the front (slant) and PATENT on the reverse. The scales (handles) are genuine horn and mostly Black & Cream with a little Caramel and are in good condition. The knife works great with the blade tip deep in the well closed, strong snap and tight lockup open. Does not rattle if shaken with blade open. Safety works. EX+ condition.