The lampholder is exactly what we use in Austria. Those rated for more than 60w bulbs are made of metal and porcelaine, but look mostly the same. As I mentioned, Schuko stands for Schutzkontakt, word by word translated this says "Schuko plug = protection connector plug" The "protection connector" (Schutzkontakt) is simply the ground connector. ( not to be mixed up with Schoko, which is short for chocolate)
