Phra Chinnarat Bai Sema is
Phraphutta Chinnarat Buddha image (fig.) from
Sri Rattanamahathat Wora Maha Wihaan, which is seated in the
half lotus position on a
lotus pedestal and in front of a structure
called crystal palace, or reuan kaew in Thai (fig.), which has a shape reminiscent of stone boundary markers, that are known in Thai as
bai sema (fig.),
hence the name of the amulet.
See also POSTAGE STAMPS.