These 11 hand-soldered circuit boards are from either the Zuse 23 computer (1961-1967) or both. (It is possible that some of them are from an earlier model, the Zuse 22 computer, manufactured between 1955 to 1961.) The company produced 55 (some sources say 56) Z22 computers and followed that up with a successful model Z23 computer of which 98 were made. The Zuse KG company suffered financial setbacks starting in 1961 and by 1964 was bought by Rheinstahl, then BBC and in 1967 it was bought by Siemens.

Konrad Zuse is generally credited with creating the first programmable computer, the Z1, in the mid-1930s. The Z1, Z2 and Z3 were destroyed during the Allied bombing of Berlin in December 1943.

The boards in our collection are from one of the engineers who worked for Zuse KG in the 1950s and/or 1960s. They are:

• T01
• T07
• T10
• T14
• T46
• T48
• Ts220T
• Ts633
• Ts643c
• Ts660 (00 55 1 F)
• Ts660 (cracked)