Singapore Assay Office (SAO), a division of Singapore Test Services was set-up in November 1979 with the prime aim of implementing hallmarking of precious metal articles in Singapore as well as providing assaying services to industries...
We conduct testing based on Singapore Standards (SS581) to determine the fineness (purity) of precious metals, and provide hallmarking services. This allows consumers to identify articles that meet the prescribed fineness levels and safeguard their investments.