This paper explores the rescue archaeology project of the National Museum of the Philippines (NMP) in San Antonio, Northern Samar in 2019, which aimed to preserve and recover a jar reportedly used for mortuary practice. The project assessed the extent of damage to the burial jar and to the site caused by an infrastructure project in the area. It also investigated the morphological features of the jar and its significance in respect to the development of the Metal Age in the Philippines. The remnant burial jar had a round, egg-shaped bottom and a diameter of 57 cm. The rim of the jar had been destroyed during the construction project. Locals stressed that it was found with a stone slab cover, a practice attributed by Fox and Evangelista (1957) to the Circum-Albay Gulf culture, initially found in the Bicol Region. With more local reports of burial jars on the site, further extensive archaeological exploration and excavation on the island is recommended to better understand the jar burial and its context, and to establish relations with other burial cultures across the Philippines and Southeast Asia.