In the late reign of the King Rama 4, a clerk named Duang Dhanakoses had reconstructed the monastery of Wat Mai Amata Rot. The same time he also constructed a new Chedi here for great merit. The construction started in 2411 (1868) and lasted in 2413 (1870).
In this construction, there were both of large and small Chedis. The large for filling the Buddha amulets by ancient motto for succeeding the religion of Buddhism. The small Chedi for filling the ancastors bones. When the construction was finished , Mr. Duang asked for permission to Somdej Phra Buddhachan (LP Toh) Promrungsee for making the Buddha amulets to fill in the large Chedi of Wat Mai Amata Rot.
Somdej Toh gave some of sacred powder (same as used in making of Phra Somdej Wat Rakhang) to use for ingredients to make the Buddha amulets. Somdej Toh also pronounced incantations on these newly made amulets. After that he filled all of amulets into the large chedi.
The main ingredient of these amulets is lime. The amulets were made in square shape same as Phra Somdej Wat Rakhang. The amount of Buddha amulet was named “Phra Somdej Bang Khun Phrom” by the name of sub district where the Chedi was located.
The age of Phra Somdej Bang Khun Phrom is not far from Phra Somdej Wat Rakhang. But the mould is different due to different groups of the sculptors. Anyhow, both of two Buddha amulets had the same outline.