On the left the monk’s name is “Phra Khru Obhāsa- - -ānukicca”. The hyphens are the letters that aren’t clear to me. On the right it says that the amulet was made for his 50th birthday.
The Great Sage did thus proclaim
With many a diverse chosen name
Vipassanā stilled and purified,
That to Emergence is allied.
Saṃsāra-cycle’s swamp of pain
Is vast and terrible; a man
Wisely should strive as best he can,
If he would this Emergence gain.