During the period when Heligoland (a German island in the North Sea) was a British possession, about 20 postage stamps were issued between 1867 and 1890. There were up to eight printings of a single denomination and also a large volume of reprints which are known as the Berlin, Leipzig and Hamburg Reprints, respectively. The Berlin reprints are sometimes better quality than the originals. The reprints were done between 1875 and 1895. Consequently, many "old" collections contain reprints rather than originals. Some believe there were seven million reprints as compared to the known 1½ million originals, of which perhaps half were sold through the post office and the remainder sold to dealers when withdrawn from use. A few printings were never postally sold but nevertheless found their way in