There are many different analog computers. Most are large and looking like breadboard with nice colors.
I recently found this large one from Solartron, displayed at a museum in Gent, Belgium.
Another interesting one is the MiniAC from EAI (Electronic Associates). The plugboard can be removed. Also nice Nixie tube numbers.
There is also a teaching computer (simple board) by LEYBOLD-Heraeus
To me, analog computers must have colors on the board, not like the ones from Telefunken