The article has only an image of the Z4 in Munich.
I find the reconstruction of the Z1, which is in museum in Berlin, much more interesting.
Excerpt from the Wikipedia article[1]:
Construction of the Z1 was privately financed. Zuse got money from his
parents, his sister Lieselotte, some students of the fraternity AV Motiv
(cf. Helmut Schreyer) and Kurt Pannke (a calculating machines manufacturer
in Berlin) to do so.
Zuse constructed the Z1 in his parents' apartment; in fact, he was allowed
to use the bathroom for his construction. In 1936, Zuse quit his job in
airplane construction in order to build the Z1.
Zuse used thin metal sheets to construct his machine. There were no relays
in it. The only electrical unit was an electric motor to give the clock
frequency of 1 Hz (cycle per second) to the machine.
The machine was never very reliable in operation due to the precise
synchronization required to avoid undue stresses on the mechanical parts.