company on the envelopes. Elizabeth II envelopes initially remained in use after independence, and in 1972 they were overprinted with denominations in cents, the new Malta pound being divided into 100 cents from May 1972. From 1974 to 1995, a number of envelopes with the imprinted stamp showing the coat of arms of Malta were issued. The country's coat of arms changed twice during this period, first in 1975 and then in 1988, and in both cases envelopes were issued with the old symbols obliterated, usually also being replaced by the new emblem imprinted next to or affixed over the older one. Pre-stamped envelopes Malta issued its first pre-stamped envelopes in 1900. These came in three different sizes, and they had an imprinted 1d stamp depicting Queen Victoria. These proved to be unpopular, and no further pre-stamped envelopes were issued until this type of postal stationery was reintroduced by MaltaPost on 16 September 2002. The envelopes came in two designs, with imprinted stamps for local mail depicting a luzzu and those for foreign mail depicting a map. These envelopes were popular, and they were issued in a number of different sizes and formats. On 20 May 2006, a new design depicting a Neolithic spiral design was introduced for the local envelopes. These were also issued in a number of sizes and formats. Another new design of local pre-stamped envelopes was introduced in 2011. The imprinted stamps depict a spiral design similar to 2006, along with an architectural element from one of the megalithic temples. Various denominations and formats of these envelopes have been issued since then, and they remain in use as of 2020. MaltaPost also allows companies to order personalised versions with their logo printed on the envelope. Aerogrammes Malta issued two pre-stamped aerogrammes in 1971, and they had imprinted versions of definitive stamps which had been issued a year earlier. Philately Stamp collecting existed in Malta soon after the Halfpenny Yellow was first issued in the 1860s. The hobby was popular on the islands during the British colonial period, and philatelic organisations such as the Malta Philatelic Society Zeitun existed in the 1930s and 1940s. There are a number of such organisations today, including the Malta Philatelic Society which was set up in 1966, the Gozo Philatelic Society which was set up in 1999 and the Żejtun Philatelic Group () which was set up in 2002. The Malta