Just looking at all these quality auto knives reminds me that a number of years ago,auto knives called "switchblades" back then were not of the quality now.
I remember back in the early 50's I bought a much outlawed "Wolf Killer" switchblade knife from an ad in,I think it was Field and Stream Magazine.
When it finally arrived,I opened and closed the blade a few times,then it was basically toast. So much for a $2.98 knife!!!
Just take a look at the Buck,Micro-Tec,Rat Worx to name a few. They are light years in quality in comparison to the autos of years gone by.
Yeah, back in the 80s some tried to get around legislation by selling a "kit" that was two pieces, blade and "everything else". Compliance with any state and local laws was left up to the purchaser.
For the OTF, you unscrewed one screw on a bolster, lifted the bolster and dropped the blade in place, then re-assembled.
It was a horrible "hunk of junk" knife, but I had an OTF auto!