Regular mail service in Iceland was first established by a charter of 13 on May 1776 and on 1st. January 1873, Iceland issued its first postage stamps. The design was the same as for the Danish numeral issue of the time, denominated with values ranging from 2 to16 Skilling and inscribed Island. In 1876, the currency changed to aurar and krone. In 1902, numeral stamps were withdrawn and new set depicting King Christian IX was then issued. In 1907, a new series of stamps came out, featuring overlapping profiles of King Christian IX and King Frederick VII. In 1911, Iceland's first commemorative stamps were released a set honouring Jon Sigurosson on the 100th. anniversary of his birth. King Christian X first appeared on Icelandic stamps in a new set of 1920. In 1930, Iceland celebrated 1000th anniversary of the Althing featuring a wide variety of historical, mythological and scenic images. In 1931, stamps were overprinted Zeppelin / 1931 and also an issue depicting the Gullfoss waterfall. Iceland semi-postal stamps appeared in 1933. In 1938, a dramatic series featured images of geysir the namesake of all other geysers. There are annual Christmas and Europa issues depicting local scenery, flora and fauna, as well as the work of local artists.