A wristwatch bracelet segment includes a core and decorative elements mounted thereon in longitudinally spaced relationship. The core comprises first and second flexible core elements. The first core element is elastically stretchable and includes longitudinally spaced enlargements that define recesses therebetween. The decorative elements are mounted in respective recesses. The second core element is somewhat stiffer than the first core element and is installed through a longitudinal passage formed in the first core element. The first core element is stretched longitudinally to reduce its cross-sectional shape in order to enable the decorative elements (preferably of tubular shape) to be slid onto the first core element. The ends of the second core element are configured to receive connecting pins for connecting a clasp to the bracelet segment, and connecting the bracelet segment to a wristwatch casing.