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The postage stamps and postal history of Guam is an overview of the postage stamps and postal...

The postage stamps and postal history of Guam is an overview of the postage stamps and postal history of the Pacific Ocean island of Guam. Its postal service is linked to those of the Philippines during the Spanish Empire and, since 1898, to the United States of America. A peculiarity is that, for a short period in the 1930s, Guam had a local post service. Because the US Postal administration issued the same stamps in Guam as in the United States, cancellations are the only way to identify a stamp as having been used in the island. Between the 1930s and 1970s, during the creation of trans-Pacific airways, stops at Guam were commemorated with special illustrated marks. During the Spanish Empire, Guam was considered part of the Mariana Islands that were claimed by Spain since the 16th century. Between 1876 and 1882 stamps used are those of the Philippines illustrating a portrait of King Alfonso XII, the Spanish coat of arms (1881–1888) and, after 1890, the child profile of Alfonso XIII. Following the victory of the United States in the war of 1898, in December 1898 Spain agreed by the treaty of Paris to sell the island of Guam, while the others Mariana islands became part of the