Furuno marine radar unit as seen on the Seenotrettungkreuzer "Berlin" scaled in 1:25.
The model is build with a motor with a diameter of 4 mm, a gear reduction of 1:700, a decal printed on a Alps MD5500 and nickel plated hexagon screws with a wrench size of 0,6 mm.
A video is aviable on YouTube
https://youtu.be/RsOiNy5wrMA