Denmark's first pictorial stamp was a 5-kroner issue depicting the Copenhagen General Post Office. King Christian X appeared in profile between 1913 and 1928, in a long-lived series that featured a number of color and value changes. In 1918, a need for 27 øre value resulted in surcharges on newspaper stamps, some of which are scarce, with prices today of up to 200 US$. On 5 October 1920, Denmark's first commemorative stamps, a set of three pictorials, marked the reunion of northern Schleswig with Denmark following a plebiscite. 1924 saw commemoratives for the 300th anniversary of the postal service, and in 1926 the original two designs were adapted for an issue noting the 75th anniversary of their introduction. In 1927 a set of six stamps depicted a caravel, modeled after an old engraving. The 1927 set was typographed; from 1933 to 1940 the design was reissued with the use of engraving instead. The engraved design was soon changed to reduce the left-side margin, with the "Type IIs" having only one column of squares between sail and frame line, where the "Type Is" have two columns. (Both types are common today, except for the type I 25o blue.) During World War II, Germany occupied Denmark, but the stamp program gives no evidence of that. A new series depicted Christian X full-face instead of in profile, and continued in use after the war. However mail was subject to German postal censorship. In 1946, a new design appeared for high values; the three lions of the state seal. Like the wavy lines design, this design remained in regular use for the highest denominations into the 1990s. In 1976 Denmark handed over responsibility for the postal service in the Faroe Islands to Postverk Føroya. Modern issues The modern stamp program of Denmark tends to use relatively small stamps produced using engraving. While the quality is high, engraving limits the range of colors available, and so the use of lithography has been creeping into issues, often in addition to engraving. The number of issued stamps has gradually climbed, from 5-10 per year in the 1960s, to around 20 annually in the 1990s, with several thematic sets (usually of four stamps each) per year. Postal stationery Postal stationery envelopes were produced in Denmark from 21 December 1864 till 1967; during which time a total of 78 different items were produced. Envelopes were only produced in two