All very beautiful.
What might have happened with Yannis' kiem is that the double fuller evolved to a raised ridge by someone taking the idea a step further. Looking at the photo of the ricasso, I see a basically diamond cross-section blade, meaning that the fullers seem to have run completely off the edge of the blade, leaving the ridge. I don't see any of the concave effect evident on the older blades Nick has posted (not to say it isn't there, but I just don't see it).
The elephant molar makes for a great effect in the grip.