A thokcha Om syllable. This talisman can probably be assigned to the early Buddhist period. As exemplified by the double vowel sign, the syllable is either part of the Bon tradition or an early Buddhist orthographic variation The syllable Om has vast esoteric implications in Bon and Buddhism. Its signification includes the acoustic origin of the universe, a symbol of the primal nature of the Buddha, and a meditational seed syllable, among other diverse meanings.