Ok, looks like OSCE e.V. is the favorite.
Just want to say, I would vote for including “Days” - because “OSCE” is a big abstract concept. It is like “economy e.V.” – It is a huge (& therefor empty?) claim. Also a bit like “Cradle to Cradle” puts a brand on something that should be an open term… can only work as a really open term. Now you can’t talk about the concept and not talk about them at the same time. Which is sad.
If we add “Days” to it, we have something unique – we show that we represent one approach. And we show our heritage. The story will always be “They started as an event and now they also …” So why not keep the days!
And it has a positive and nice message: It started as 5 “Days” - now they are permanent active … and in the future we will have 365 OSCE"days" in the year. Because we have an OSCE …