Knife Solingen

I own an unique old knife and I am looking for a way to find out more about it and its value.?

It has a wooden handle and is made of stainless steel. Highly polished. The blade is stored in the handle and is released by pressing a lever on one end that allows the blade to come straight out of the handle(not as pivot). There is a “D” ring on the opposite end from where the blade comes out. There is also another tool in the handle. A pick like pointed blade like an ice pick. The handle is appx. 6″ long and the blade is 4″ long. The blade has a crest on it that reads “PAUL WEYERSBERG & CO. SOLINGEN” in an ovel with a sword in the center and what looks like flower stems on each side of the sword. Under the ovel is the word “ROSTFREI” I think it is either Dutch or German. It was my fathers and he brought it back from Europe after WWII

My husband says its probably a german military parachute knife. ROSTFREI means rust proof in german. Look at the following link…

How it’s made: Solingen Knives