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A c1935 Art Deco engagement ring with a 0.52 carat transitional round brilliant cut diamond set in a yellow and white gold mounting. A particularly stylish and nicely detailed example of a two-toned engagement ring from the 1930s. The center diamond has a GIA certificate stating J color and VS1 clarity. The ring is marked CM.Co, possibly the maker's mark for a Newark jeweler named Charles Masserman.