Here are some breakdown pictures of another French lock I found in ebay.
Another one with a plastic plug.
It's called Bloctout, by Bricard: http://www.bricard.com/asp/Fiche.asp?no=1B3
They classify it as a "normal" (not "high") security lock,
"The absence of a spring hinders lock picking.
The rotor is made of polyacetal, reducing overall wear."
"double notched key"
The key is indeed interesting: It consists of 2 halves, separately cut, then fixed together. Similar to the BiLock, but not bent, but made from 2 parts. That's necessary, because there are no springs, and therefore the key's width has to match the openings in the springs, therefore each half key has to be cut on both sides.
Well, I'm not sure if this makes sense to you, but here are the pictures, they should help:
The cross section of each half key stays the same all the way.
Here you can see even better that the key is made from two halves:
You can also see that there are 7 pairs of wafers (= 14 wafers in total). In each pair, one wafer interacts with the left half of the key, while the other one interacts with the right half. Each wafer therefore has a cut that's exactly the shape of the half key's cross section on one side, while it's long on the other side, so that it doesn't interact with the other half of the key.
Doesn't make sense again, this guy can't write proper English? What? Half keys? Well, I have another picture for you...
If you look carefully, you will find 3 wafers that are smaller in overall size. I'm not sure why exactly, but I think that's part of a masterkeying concept.
On the last picture you can see the wafers on the key.
You can also see a metal fixed part inside the plastic plug; I guess that's used for profile checking.
All in all, I would say that this is a nice concept, but not my favorite.
Picking is quite hard - there are so many wafers and just gravity to pull them back. I didn't succeed (didn't try for a long time, though). Decoding should be possible.
Hope you like it anyway.
Cheers,
mh
