Which slipjoints have a liner lock and a backspring?

[mp510]

I believe there is a recent/current Colonial offering that has a liner lock and backspring (it's a single blade clip point) as well as some renditions of the electricians knife. There's also the Case Russlock as another poster pointed out.

 

[sunshaker]

Most, if not all of the locking Vics have backsprings as well.
Not exactly traditional, but hope it helps.

The Wenger 85mm SAKs with locks don't use a Liner lock but they do have backsprings. I don't know about the Wenger 120mm SAKs (don't own one yet) but I think (I could be wrong) that they use a button activated liner lock with backspring.