Ostby Barton 18K art deco diamond engagement ring, antique, size 11

This ring is a stunner. It is so rare to find an Ostby Barton with precious stones, and almost unheard of in this size. Ostby and Barton jewelry is coveted, E.C. Otsby was among the 1,500 passengers that perished on the Titanic. He was on his way home to America from a European gem-buying trip. But then, if you’re looking at this, you probably already know that. This is a genuine OB art deco diamond ring with blue sapphire sides, circa 1918. The specs: Natural diamond, .45 carat, old European cut, champagne color, SI1 Sapphires: .18 ctw, French cut, dark blue Metal: 18k white gold, 2.2 grams, stamped OB 18k Face height: 8.2 cmm Rise above finger: 6.2 mm Band width: 1 mm This ring is a size 11 and can be sized by a jeweler. Feel free to make a reasonable offer.