ROSTFREI PATENT 20cm Italian Humpback 1960s vintage automatic knife

Vintage Italian 20cm Humpback stiletto switchblade knife. The knife was made in the 1960s and these are referred to as Humpbacks due to the hump/bump on the back spring that you press to close the blade. The knife measures 20cm (7 7/8 inches) open and 4 3/8 inches closed with D stamped brass liners and German silver bolsters, button and safety cap. The flat swedge blade is 100% full with all of the factory finish and is marked ROSTFREI on the front and PATENT on the rear of the ricasso (tang). The horn scales are black and in very good condition. The knife works great with the blade tip deep and centered closed, nice smooth snap and excellent lockup.  It is coil spring fired with no kickback. Safety works. Really beautiful vintage Italian humpback switchblade.