Either the Police SS or Military. For me the idea of one model representing the entire lineup, is considering all the other models that aren't a Delica or Endura, because the design and "style" of Spyderco knives has gone quite far away from those designs and I don't think they truly represent the company and design as a whole anymore. That would be like saying the F150 represents Ford as a vehicle, when they make so many other models in vastly different designs. Now that I think more about it, I think the one knife that has the most new and old mixed into it, the most old styling meets new styling, is probably the Caly 3.5. Unlike the Delica, the Caly carries over a lot of tradition but has also changed a lot more from the original design.
SHARPEN IT LIKE YOU LOVE IT, USE IT LIKE YOU HATE IT