Poly-Play
The machine's coin slot works by detecting pressure. It uses 50 Pfennig, but can be tricked by pressing a 1 Pfennig coin the correct way into the top of the slot. This was mostly allowed because the government owned the machines, which were mostly found in FDGB holiday homes, youth hostels and non-profit clubs. The machine could be played for free at many youth clubs until large crowds often came around them.