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Period: c. early 1920s post-Victorian with ornate open-metal scrollwork
Maker: The piece is stamped “O 10K B” alongside a Maltese cross. The maker’s mark is that of jewelry manufacturer Ostby & Barton Company from Providence, Rhode Island (established July 1, 1879). Englebart Ostby was a renowned jeweler who trained at the Royal School of Art in Norway. His jewelry company was a highly regarded ring manufacturer of the era. Yet Ostby would never witness the extent of his company’s success, as he was among those who lost their lives in the sinking of the Titanic in 1912. His daughter, Helen, who was also a passenger, survived. Helen and Ostby’s brother, Harold, became joint owners of the company in 1914, and the company continued production until c. 1950.
Materials: 10K gold; diamond
Dimensions: approx. 6.40 mm wide at the top, measured north-to-south; stands 5.20 mm tall above the finger
Size: 6 (free sizing)
Diamond: GIA-assessed (GIA eReport) .72 carat Old European Cut diamond with K color and VS1 clarity
Item MT20
CAAE
