This paper presents a multifaceted study of a collection of stoneware ceramic vessels in the Guthe Collection of the Museum of Anthropology, University of Michigan. These vessels, recovered in the Philippines but manufactured in multiple production sites across East and Southeast Asia, provide insights into premodern economic interactions and maritime trade. Our study of this collection drew on multiple approaches to identify coherent groupings of vessels associated with locations and traditions of production. These include instrumental neutron activation analysis (INAA) of pastes; laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) of glazes; stylistic analysis of decorative motifs and their execution; and study of morphological attributes. Results of our analyses point to at least four production areas for these ubiquitous trade wares and lay the groundwork for future research on Southeast Asian maritime trade from the twelfth through nineteenth centuries A.D.