Gold and Diamond Tie Tacks with Safety Chains

This pair of personal accessories consists of two tie tacks, though styled similarly to cufflinks, featuring circular gold settings and brilliant-cut clear gemstones, identified as diamonds based on provided context. Each piece is constructed with a single round diamond set into a polished yellow gold bezel or cup setting that provides a reflective backdrop, enhancing the stone's brilliance. Attached to the pin backing is a delicate curb-link safety chain that terminates in a T-bar, designed to hook into a shirt buttonhole to prevent loss. The metal exhibits a rich, warm tone consistent with high-karat yellow gold. These items appear to be vintage, likely from the mid-20th century, displaying classic craftsmanship with secure friction-post backs. In terms of condition, the metal shows light surface abrasions and a slight patina consistent with age and occasional use. The stones appear securely set, and the chains remain intact without visible kinks or broken links. The overall construction suggests a high-quality fine jewelry piece intended for formal men's attire.