Vintage men’s signet shops ring Far East souvenir ring in original Art Deco ring box sterling silver gift for him

Click for more details - chunky and a bit mysterious, this unusual sterling silver signet ring is marked on the face FAR EAST SSS with a caduceus inside a large stylized M. The shops box bears the name: Sakabe & Co, Kobe. Crafted with an adjustable shank. Looks to be a souvenir ring.
Kobe, Japan was an important port city and opened for trade with the west in 1853. K Sakabe and Co was apparently an importer/exporter. An advertisement of theirs was found in the 1919 International Trade Developer publication.
Marked STERLING
Face, N-S: 18 mm
Rise: 5.4mm
Shank: 3.4mm
12.2g
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This item ships free domestically.
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*I am not a professional jeweler, gemologist, or appraiser. I appreciate quality vintage jewelry (from fun to fine) and enjoy carefully curating a collection that I hope you will enjoy.