Official Portuguese Hallmarks

Discover the marks that identify who places a piece of jewellery on the market and guarantee the type and fineness of its precious metal.

Reading a piece of jewellery

Two marks. Two meanings.

Responsibility mark

The responsibility mark, maker’s mark or equivalent identifies the party responsible for placing a precious metal article on the market. It features a distinctive design and a letter from the person’s first name, surname or business name, clearly differentiated and enclosed within an outline.

Assay office mark

The assay office mark guarantees the type and legal fineness of the precious metal, or indicates specific circumstances provided for by law. Fineness expresses the proportion of precious metal in the alloy. The symbol varies according to the metal.

01 / Current chart

Portuguese assay office hallmarks

The hallmark chart in force since 1 January 2021, provided to help you consult and identify the symbols.

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Chart of official Portuguese hallmarks in force since 1 January 2021 — Original document in Portuguese. Open the image to view the details and zoom in on your device.

02 / Historical reference

Hallmarks — the 2015 chart

This earlier chart is included as a reference for recognising marks from previous periods. It should not be confused with the current chart shown above.

In the 2015 chart, the outline distinguishes Lisbon and Porto assay office marks: a curved outline for Lisbon and a symmetrical irregular octagon for Porto. This distinction should be read in the context of the historical marks illustrated here.

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