the number 9 on your antique Bracelet from Portugal could be the gold standard, meaning 9 carat gold;
the modernization of Portugal's hallmarking system began in 1887 with the utilization of a series of consistent hallmark core images.
It is the identification of these core images that yields the most important information about the hallmark. Coupled with the mark's shape outline, this exceptional method of hallmarking, still in use today, qualities Portugal's hallmark as being inclusive in design.
So its the frames-shape outlines and core images, both important in understanding Portugal's hallmarking methodology.
A photo of the mark would be very helpful and If you require an on-line appraisal at some time, essential.