tilt turn window

My landlady was showing me around the garden apartment — the previous tenant had moved out, and she and her husband were getting it ready for the new tenants. As is the case with the whole house, everything was well designed and full of great details. Thom is an architect after all. She was showing me the windows, which she called european style. Whoa!! These are exactly the ones I had in Switzerland. Wonderful, wonderful engineering and design. They open normally, but turn the handle up and the top of the window tilts away from the frame. It’s safe and allows air to circulate. A little bit of googling brought me to some youtube videos, and the knowledge that they are called tilt turn windows here.