A few years ago, I bought a pen very similar to these pens (almost identical to the first one, but it had one color bubble, not three):
At a flea market. I LOVED it and used it every day... until it was stolen off my desk. I have been searching for it ever since, and only recently had the bright idea of asking my family for help. They searched for it in german terms (bought it at a german flea market with german family members) and my uncle found the above results. I can't seem to purchase it on Amazon, as it says it's out of stock and the last purchase was in 2016, and I can't even find it for sale anywhere else.
To me it's really special because it's not one of those slider-pens, but instead uses gravity to choose the color it sends out. I've had bad experiences with the slider type getting stuck all the time. As I am still in school, I take a LOT of notes and like to color code for clarity, and I loved having this type of pen, and really miss it.
Does anyone know what it is called? Or how I could possibly find it and buy it somewhere? Or even maybe have one they're willing to sell? I am rather poor but I'd like to at least give it a try.
Thank you and I hope I didn't do anything wrong! This is my first post here, though I've read posts here for a while.