This is a fun question! We always talk about "what's the oldest" of such a knife, but hardly ever "what's the newest". Since these threads always get into "we that was a special run so it doesn't count" type discussion, so I'm going to think about this in three different groups:
- Low volume "collectors" runs - stuff like SwissBianco, VSACKS, etc, put together where they custom order 100-200 of something
- Mid volume "special" runs by Victorinox - special collectors stuff like the Apollo 11 Tinker where they make a couple thousand and you can order from Victorinox
- High volume regular catalog model.
Here's what I can think of off the top of my head. Let's see if other can think of newer ones.
For the high volume 84mm, start date of the Watch Case Opener and the My First Victorinox models are fuzzy so not sure which came first. Both seem to start in the late 90s/early 2000s.