Graduated Imitation Pearl Necklace with Central Metallic Bead

This is a vintage pearl and possibly base metal or silver tone necklace. The necklace consists of a graduated string of approximately 30-35 individual beads. The beads near the clasp end are smaller, increasing in size towards the center, culminating in a large central spherical gray/silver bead. Many of the beads appear to be imitation pearls, possibly glass or plastic with a nacreous coating, exhibiting a creamy white to slightly off-white hue with a visible sheen. Some of the beads, particularly the smaller ones, show a slight ridged or patterned texture, suggesting they might be molded or have a decorative cap. Each pearl-like bead is separated by a small, textured, possibly metal, spacer or bead cap, giving the appearance of individual settings. The condition appears to be good with some minor wear consistent with age, such as slight abrasions on the pearl surface or minor tarnishing on the metal elements. The large central bead is highly polished and spherical, acting as a focal point, and it might contain the clasp mechanism. A small, stylized metallic tag or charm is attached near this central bead, which could be a manufacturer's mark or material stamp, though details are not clearly discernible in the image. The craftsmanship suggests a manufactured piece, likely from the mid-20th century, given the style of imitation pearls and metalwork. The overall aesthetic is classic and elegant, typical of vintage costume jewelry designed to mimic fine jewelry.