The "Phra Bu" (บุ) Craftsmanship: These small statues were not solid metal castings. Instead, a core was modeled out of a dense, medicinal herbal paste and tree resin mixed with sacred clay, known as Wan-Khrang (เนื้อว่านผสมครั่ง). While the core was still semi-pliable, an extremely thin sheet of precious metal—in this case, hammered silver leaf or foil—was meticulously beaten, stretched, and pressed over the mold to pick up the fine lines of the icon.
Iconography and Style: The Buddha is depicted seated in the Bhumisparsha Mudra (Subduing Mara / Calling the Earth to Witness) atop an exceptionally distinctive, high trapezoidal tiered pedestal (Phim Than Sung). The pedestal is richly chased with cross-hatched, triangular lattice patterns characteristic of late Ayutthaya decorative styles.
Archaeological Context: Objects of this nature are famously associated with sacred crypt deposits (Kru), such as those unearthed at major regional temples like Wat Ratchaburana in Ayutthaya. They were commissioned by wealthy nobility and merchants as supreme acts of Buddhist merit-making to secure spiritual protection and long-term prosperity.