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Pearls-Mikimoto?~Tiffany? Pearls-Mikimoto?~Tiffany? Someone has suggested the "T" stands for Tiffany. I'm not sure how to post a picture so is you want to email me at lisa1115lisa@aol.com, I can send some.

I recently purchased a beautiful pearl necklace with a sterling clasp! The hallmarks are an "S" in a square and a "T" in a clamshell. They are vintage, probably 40 years old or more. Does anyone know if Mikimoto ever used any other letter than an "M" in the clamshell? Thanks!!