Italian vintage Rostfrei 18cm stiletto Black Pearlex switchblade

Nice vintage 18cm Italian stiletto marked Rostfrei, most likely from the late 70s, early 80s. The knife measures 17.5cm (7 inches) open with brass liners, three steel bolsters and One nickel silver bolster. The top rear bolster is nickel silver. I don't know why they did this, but I've seen it before so I'm confident it's how it was made. This is a swivel bolster knife so you have to swivel the top front bolster to release the blade to be closed. The blade is full and retains most of the factory finish. The scales are Black Pearlex which makes it look like Black Lip Pearl. Very nice and very pretty! The knife works well with the blade tip seating deep, strong snap and good lockup barely any wiggle. The safety works. Beautiful little Italian black pearl stiletto.