These two bracelets are not a pair but are very similar and in fact are almost certainly by the same maker, in the Yemeni town of Zabid. A similar bracelet is illustrated in Ransom (2014, p. 152) and attributed to Zabid.
Both are of hollow, but of thickly-walled silver. Each is decorated with fine ribbing and applied diamond-shaped plaques. One also has bands of applied silver granulation work. Each also is faced with a round, coin-like plaque etched with a pointed star.
Both are of good size and are wearable. Each is free of dents, losses or repairs. Both have pleasing wear from age and use.
Ransom, M., Silver Treasures from the Land of Sheba: Regional Yemeni Jewelry, AUC Press, 2014.