Under the inscription,at the very bottom but very worn out is .925....it's hardly visable in the photo but with a magnifier it is more evident.The pendant is not solid but hollow.
[FONT=Courier New, Courier, mono]The back of the amulet pendant has the three mantric sounds known as the three vajras, OM, the body vajra, AH, the speech vajra, and HUNG the mind vajra.
Don........[/FONT]