Pra Somdej amulets of batch Ron Udonmongkhun B.E 2543 were mixed with many old holy powders
left over from various passed batches, similar to those of B.E 2531.
Although they were made only recently, they were mixed with gradular pieces of old powders which were easily seen.
Some of the rare pieces as shown were more expensive then normal models from the B.E 2531 batch.

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Wat Bungkhunprom Somdej B.E 2531 | More Amulets of Somdej B.E 2543
Pra Luang Pu Thuat Amulets B.E 2539