First thing you notice is the rounded design and the unusual keyway. The blue imprint mentions 6 mushroom pins and "outstanding quality" which in this case isn't a lie: You can feel the quality when you insert the key and when you lock or unlock it. It's a joy and that's why I had to get one.

The paracentric keyway makes the Diamant hard to pick, and even if I was able to open one before, I had no luck with this one yet.
I did a forum search on the Diamant but wasn't able to find it, only DOM Diamant. So I made some pictures:


