Finally I got some images scanned, so here they come.
Photo #1 shows an ungrounded 3way adaptor like it was common in the 60ies. When the plumber couldn't find a receptacle for the new washing mashine in the bathroom (Back when the wiring was installed outlets in bathrooms were banned, only shaver outlets with an insulation transformer were allowed) he hacked a hole into the brick wall, threaded the cord into the adjacent room and hooked up the grounded Schuko plug to the ungrounded receptacle.
Photo #2 shows a light switch that was mounted on a doorframeFirst it is mounted sideways, which is at least a little bit strange. The wires emerging the switch are a 4" piece of zip cord. The block connectors are my work, the wires weren't connected at all, just taped up. I also added the tape on the single wires emerging the plaster wall.
Greetings from Austria