The Z3 in the Deutsches Museum is only a replica, but one built by Konrad Zuse and his company in the 1960s. The original machine was destroyed in WW2. The Z4,

The Z3 in the Deutsches Museum is only a replica, but one built by Konrad Zuse and his company in the 1960s. The original machine was destroyed in WW2. The Z4, however, is the one and only original machine. If you´re interested in Zuse history, there´s a great exhibition of Zuse machines at the Huenfeld museum (the town where Zuse rebuilt his company after WW2): https://www.zuse-museum-huenfeld.de/ https://www.zuse-museum-huenfeld.de/ and the computing centre at Erlangen University (FAU) has restored their Z23 to working condition some years ago: https://www.video.uni-erlangen.de/search/term.html?q=Z23 https://www.video.uni-erlangen.de/search/term.html?q=Z23 The Technikmuseum in Berlin also has a Z3 replica built by Horst Zuse (Konrad Zuse´s son) and his students: http://z3-computer.de/ http://z3-computer.de/ Most of the linked pages are in German, the Erlangen page has some interesting videos.