Swithchblades are another of my hobbies, I currently own around 3 dozen or more ranging from the el cheapo gunshow specials all the way up to a one of a kind Hubertus. I have many Frank Beltrame models, hand made in Italy, also several very high quality Itailian knives that were sold under the 'Walts' brand, hand made high quality and definately not cheap. I also have a Microtech 'Halo' OTF which can only be described as a deadly weapon.
Also I have a 1950's Italian switchblade carried by a n'er do-well Uncle way back then, he used to let me play with it when I was a kid, of course he was one of my favorite relatives. I've never been able to trace the tang stamp on it.
I'll try to post some pics of the differences in cheap vs. quality tomorrow.
One other thing, most people close a swithblade (stilleto type) by simply pushing the blade closed, that is incorrect and will wear the release mechanism in no time, the correct way to close one of these is like setting a bear trap, hold down the release button (this withdraws the release bar) then close and hold the blade and release the button. Just like settiing a trap.
RD