All SOPRO pieces are produced in Portugal fulfilling all criteria of quality, 925 silver with gold plated of 24 carats, duly certified by Contrastaria of INCM.
INCM's Contrastaria provides this guarantee by verifying the legal touch (perming precious metal contained in an alloy) and the application of the contrast next to the manufacturer's responsibility mark or equivalent. " The application of the marks is only compulsory in pieces weighing more than 2 grams. The legal marks of the Portuguese contrast.
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