That's a Chua's Diode board for the analog computer Confetti.
With the jumper set one can connect the output to the common ground, if no jumper is used one can use the output connector instead.
In combination with the Confetti101 Gyrator one can build a Chua's Oscillator.
Analog Computing 01 - Chua's Circuit
The Confetti102 Chua Diode was designed by Wolfgang Spahn 2015-20.
It is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.