What does PGDA mean on silver?

PGDA on silver typically stands for "Plata de Grado de Aleación," which translates to "Silver of Alloy Grade" in English. This marking indicates the purity level of the silver, often referring to its composition in terms of parts per thousand. For instance, PGDA 925 signifies that the item is made of 92.5% silver and 7.5% other metals, commonly used in jewelry and silverware. Always check for additional context or certification to confirm authenticity.