I dont take certificates as proof i take my own eyes and training/knowledge. This one i declare authentic and can see the authentic Muan Sarn Sacred Powders of the true 2497 BE Luang Phu Tuad Wat Chang Hai - Beautiful. In moist rainy weather one will notice the orangey yellpw 'wan' herbal components become more visible. the rear face has the ubiquitous 'rae' or 'hin sila nam' black crystalline fragments visible which one finds in the 2497 first edition amulet. An eternal classic! Satu.