

Logitech is swiss, and they used to make mice in Europe. Its all Chinese/Asia now though.
Rollerball mice would definitely be easy to do, but laser and optical mice require pretty advanced CMOS sensors. Developing a brand new sensor and being competive would be very hard.
Keyboards are easy, not much specialised components, and Cherry is already German (and still made in Slovakia if google is to be believed). Some injection moulded plastic, basic PCBs and a microcontroller.
I bet I can take worse photos with my Sony A9 :D