BTW: I´ve contacted squadra and they said

"Yes we made those a long time ago. We don't make them anymore. Also all components and layerboards are gone. Sorry."

Now, as I am no electrical engineer, I barely understand the scheme:

The inner "lines of circles" are the chip, the outer lines is the socket, Connections, Resistors and Capacitor are all clear, but what kind of switch is used and how does this switch work?

The "2Timer" from moates has one (1) wire coming out and a switch for "connected to mass / not connected to mass"...