I have found an old circuit board that originally came out of an old 80’s kempston Joystick.
Top view, the pads on the left have the wire colours as part of the solder (helpful)
Underside, the chip is a ne555 timer, I assume this is set up to de-bounce the switches.
Wire and 9way D-Sub (Looks the same same as a serial) connector this is pretty standard as a connector.
In theory this could be wired up and connected to an arduino micro-controller to act as a joy stick for something, or perhaps connected to a raspberry pi.
IIRC the switch was used to enable auto fire, ideal for games where you needed to keep shooting at something but at the same time dodge enemies / obstacles etc.