Antique 18k Gold and Platinum Studs or Cufflinks with Engraved Symbols

This pair of vintage jewelry components, likely formal shirt studs or small cufflinks, showcases a mixed-metal construction typical of high-end early 20th-century craftsmanship. Each piece features a domed, circular head finished with a distinctive brushed or frosted texture. One appears to be crafted from yellow gold while the other shows a darker, possibly tarnished silver-tone metal such as platinum or white gold. The yellow gold stud features a prominent engraved square/rhomboid maker's mark or decorative symbol at its center. The darker stud displays a more complex engraving that appears to be a stylized crown or heraldic crest above a chevron-like base. The edges of the darker stud feature a delicate milgrain or coin-edged border, a hallmark of Art Deco or Edwardian period detailing. In terms of condition, the items show significant superficial wear, including fine scratching, surface oxidation, and debris accumulation in the recessed engraving areas. The darker piece displays some loss of original luster or potentially the remnants of a specialty finish. These artifacts appear to be hand-finished, indicating a high level of artisanal quality from the mid-Victorian to early Art Deco period (circa 1890-1930).