No question but that it's a dual relay switch. The legend on the copper side of the PCB actually identifies the Common, Normally Closed and Normally Open contacts of the Left and Right relays. I imagine the pot might control the switching point i.e. how far you have to push the stick before the relay is triggered. The only unanswered questions are
1. What is the current rating of the relays (often inscribed on the face of the relay itself)? and
2. Is the switch latching or non-latching i.e. does it stay closed when you let go of the stick? Easy enough to find out by trying it.
I'm curious to know who made it, as it looks like something which has been neatly DIY-etched onto plain copper-clad laminated paper board rather than "professionally" produced on epoxy-cloth board. Could be from a magazine article. I think the ZN409CE chip went extinct around 1998, although I see they are still traded at around twenty eight quid EACH on Fleabay.......... I have a small supply which I am saving as part of my pension pot
DM