A detailed view of the functional replica of Konrad Zuse's Z3 electromechanical computer. The machine features multiple rows of black panels with numerous small toggle switches, indicator lights, and mechanical relays, mounted in a large wooden or metal frame. The replica is shown in a museum setting with other exhibits visible in the background.

THE Z3 WAS WORLD'S FIRST WORKING, PROGRAMMABLE, FULLY AUTOMATIC DIGITAL COMPUTER
The Z3 was designed and built by Konrad Zuse in 1938 – 1941.
The original Z3 was destroyed during the bombardments of Berlin in 1943.
Replicas have later been built and this one is on display in Deutches Museum, München
Photograph source: Deutshes Museum, München