The 1903 - 1906 Peso is the "King" of the USA/Philippines Type Set. This large (38 mm) crown size coin (the same diameter as a U.S. Morgan Silver Dollar) is the largest coin struck by the United States for use in the Philippines while they were under United States sovereignty.
The One Peso was designed by Filipino artist Melicio Figueroa and engraved by U.S. Mint Chief Engraver Charles Barber. The obverse design features a young Filipina woman standing to the right in a flowing dress while striking an anvil with a hammer held in her right hand. Her left hand is raised and holding an olive branch. In the background is a billowing volcano. The obverse carries the inscriptions "One Peso" and "Filipinas" (Spanish for Philippines). The reverse design depicts an eagle with spread wings perched atop an American shield. The reverse carries the inscription "United States of America" and the date.
The 1903 - 1906 Peso has a diameter of 38 mm and a weight of 29.95 grams (416 grains) of .900 fineness silver (ASW .7800 oz).