In case of doubt as to the authenticity of the trademarks, the buyer may use, for the purpose of verification, the services of the Contras:



Link of the daily prices of precious metals -      https://www.bportugal.pt/taxas-cambio?mlid=828



Link of legal marks of the contrast -      https://incm.pt/portal/uco_marcas.jsp



Conversion to grass - 1 ounce (oz) equals 28.34952 grams (g)