first spyderco to have the back compression lock

[endgame]

I have the original paramilatary and the "s" same time period both have compression lock wich was the first I say the "s".but its to close to tell?

[gbelleh]

I believe the Vesuvius was the first compression lock. Someone correct me if I'm wrong.

[yablanowitz]

You are not wrong, the Vesuvius was first, even though it was not problem-free.

[Holland]

You are not wrong, the Vesuvius was first, even though it was not problem-free.

i heard there was a bunch of problems but have never heard any details

[peacefuljeffrey]

You are not wrong, the Vesuvius was first, even though it was not problem-free.

True that.
I fell in love with the looks of the Vesuvius and so bought two.
One turned into a carry knife and one became a user.

Before the one could become a user, I had to solve a problem with one of the rear spacers that came into contact with the belly of the blade when the knife was closed! I used a Dremel to grind a U-shape in the spacer to give the blade the needed couple of millimeters of space. Of course, that spacer, when installed, has to be rotated to a specific angle so that the U is aligned with the blade correctly. Other than that it's a great knife; though it's a mystery to me how one of my specimens could have that problem and the other not have it.

I love the fact that the closure force is accomplished with a milled tang instead of a ball bearing detent. I've been seeing too many issues written about regarding ball bearing detents.

[yablanowitz]

I have the original paramilatary and the "s" same time period both have compression lock wich was the first I say the "s".but its to close to tell?

Of those two, the Paramilitary came out before the "S". The latter was more or less a second generation Salsa, which also had the compression lock.

[Scottie3000]

I think the compression lock is a great lock. I've enjoyed every knife I've had with a compression lock.