This is a beautiful mid-century vintage solitaire pearl pendant necklace by the renowned Imperial Pearl Syndicate. Features a single, luminous cultured pearl suspended on a delicate 12K gold-filled curb chain. The spring ring clasp is clearly hallmarked both "IPS” on one side and “1/20 12K" on the other. Imperial Pearl Syndicate was famous for bringing high-quality Japanese cultured pearls to the US market in the mid-20th century. 

Brand: Imperial Pearl Syndicate (IPS)

Type: Necklace

Style: Pendant / Solitaire

Metal: Gold Filled

Metal Purity: 12k

Main Stone: Cultured Pearl

Main Stone Color: White / Cream

Era: Mid-Century (1940s-1960s)

Signed / Hallmarked: Yes ("IPS” & “1/20 12K")