Vintage Mug with Guam Design

vintage silver-plated or pewter souvenir tankard from Guam, dated 1949. The mug features an etched map of Guam with various place names like Ritidian Pt, Tumon, Agana, and Talofofo. Items like this were often sold on U.S. Army and Navy bases in Occupied Japan just after WWII and are sometimes marked "CPO" (Central Purchasing Office) on the bottom. It is a collectible item, valued for its historical context and regional specificity. The material is likely pewter or silver-plated, and the item shows significant signs of wear and tarnish, consistent with its age.