
It measures just shy of 3 inches across. Siam Sterling jewelry was manufactured from the 1930s through the 1980s, and was a very popular motif in the 1950-60s. While the kingdom was officially renamed to Thailand in 1939, jewelry continued to be stamped with "Siam" as the signature. The production of this specific guilloche and brightly colored enameled jewelry flourished extensively in the post-WWII era and through the 1970s, largely fueled by American soldiers bringing them back as souvenirs.