German South West African Mark the gold content of the British Pound Sterling was 7.3224 grams, while the gold content of 20 marks was 7.168 grams. According to Gresham's Law, "bad money drives out good", so the "bad" Mark replaced the "good" British Pound Sterling. In 1901, the German Mark became the official currency of German South West Africa, hence replacing the 20 and 5 mark denominations of the German South West African Mark, for which they were also demonetized (although, they continued use in the metropolis of German South West Africa until 1907). In 1923, the coins of the German South West African Mark
Good Girl Gone Bad Tour Good Girl Gone Bad Tour The Good Girl Gone Bad Tour was the second overall and first world concert tour by Barbadian singer Rihanna, in support of her third studio album "Good Girl Gone Bad". The setlist was composed of songs mostly from "Good Girl Gone Bad" but also included some songs from her first two albums. Akon was selected as the opening act for the Canadian dates of the North American leg, while Ciara and David Jordan supported the UK dates of the European leg. Chris Brown joined the tour during the Oceanian leg. The show featured Rihanna wearing