Mid-Century Triple Japanese Saltwater Akoya Cultured Pearl Vintage Ring- Sterling Silver Sz 6 1/4This is a stunning mid century triple Japanese akoya saltwater cultured pearl ring. The pearls are 5. 50mm round. They have great luster and a light rosy pink overtone. They are set on top of a dome like setting. It is set in solid sterling silver. It is stamped "SILVER" which is an old mark for sterling. US size 6 1 4. From mid century Japan. All pearls are truly vintage and have only been lightly cleaned.