Found it! Bally Williams Test Switch

[James]

Need one of these if anyone has one? Couldn’t get menu to work and guess what, no continuity when pressed, I can get by “hot-wiring” for now but a replacement would be handy @deathrow you don’t have one and a less ropey coin door do you?

 

[RudeDogg1]

Think @myPinballs sells them

 

[Toxteth O'Grady]

I have this from an old Fish Tales I think, one of the switches has to work. PM me if you want it and I’ll send it to you

 

[pinballmania]

Also here. https://pinparts.co.uk/products/diagnostic-switch