That's a gyrator 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.
Together with the Confetti102 Chua Diode one can build a Chua's Oscillator.
Analog Computing 01 - Chua's Circuit
To build this board one needs a copper stripe protoboard (1/6 of the 16x10cm board), a paper print out (1:1) and some copper wire for the bridges.
The Confetti101 Gyrator was designed by Wolfgang Spahn 2015-20.
It is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.