bakelite power strip with textile cable - type F

This outlet is a type F outlet. This system is used in the Netherlands, Germany, Austria, Sweden, Norway, Finland, Portugal, Spain, Turkey and Eastern Europe, as well as some African, Asian and South African countries.
The most common outlets in Europe are type F outlets, also called Schuko (from German Schutzkontakt). Type F outlets are similar to type C, but with two metallic clips on top and below to earth the appliance. We also called this earthing or grounding. This kind of outlet is round with two notches on the left and right side.
There are 15 different systems in the world for home applications. If you want to know what the standard type is in your country, check out here.