Police.
Not sure why, but it could have been the first Spydie I ever saw (the P.I.G. version), in a David E Steele article in Inside Kung Fu on knife vs. stick. I think that the Police carried Spyderco's brand identity for many years, although that may be due to the material that I was looking at (combat oriented).
I've never owned one and probably never will, but its probably one of the earlier production folders designed with weapon use in mind?
Unique to Spyderco? That's difficult, many companies use opening holes, clips, high tech materials, custom designs, serreations and combo edges, premium steels, purpose specific designs, proprietary lock mechanisms, etc. even where Spyderco was there first. (but I believe even the
Gunting is an evolution of the REKAT escalator)
Given that Spyderco was thought leader in many of these areas, I would probably say the
C15S Terzoula, with Al scales. I believe this may hav been one of the first custom collaborations, incorporates a lot of the features that I've mentioned - and its also my first!
Actually, unique to Spyderco might be the 'little big knife' philosophy, so I think the
Dodo is an excellent example of that.
Or is it the
Calypso Jr, evidence of the function dictates form attitude?
To me though, what makes Spyderco unique is not any set of features that one model of knife may have, but their innovative, free-thinking approach. Two examples:
1. The MBC programme. Most companies just say: its pointy, sharp and strong, secure --> good for fighting. What other company has taken the approach of: "doesn't matter how good our tool is if you don't know how to use it, so lets train you", and "lets DEFINE the requirements of an MBC knife"? For this reason, then perhaps the
Lil' Temperance would effectively represent Spyderco in your collection. Sal's design, folding knife with legally defensible blade length and robust compression lock, rock solid grip, MBC design features and top line materials and even a name that instructs you in its use...
or...
2. The
UK Penknife. Long, long, long thread warning:
Spyderco UK Penknife
Who else would do that?!
Sorry for the lack of a straight answer, but Spyderco means so many things to so many people that you really have to figure out what it means to you.
Quick straight answer:
Dodo. That's pretty unique at the mo'. Size, blade profile, handle design, unique MBC rated lock, clever wire clip, top materials, function instructs form - economical, lightweight construction, affordable price point (you always get what you pay for with spyderco).