Authenticity Guarantee. RARE pocket watch chain necklace. 14K yellow gold antique curb chain necklace. From the 1870s-1890s. Gold curb chains were popular among the wealthy in the 19th century as a symbol of their wealth and status. Measuring 18 inches long and 1/8" wide. Weighing 1/4 ounce and hallmarked "1 AB" (A grade gold), "14 K", and "585". The condition is excellent.