This piece found its new home — December 2025
Statement Rings

Vintage Sterling Silver CTO O.C. Tanner Rectangular Onyx Signet Ring, Size 8 3/4, 10.5 Grams, Retro Letter A Design

SOLD
  • Ring sizeUS 8.75Cannot be resized
  • Weight10.5 g
This item has been sold. Similar pieces are available — browse the collection.

Description

This vintage sterling silver signet ring, crafted by O.C. Tanner and marked "CTO STER," is a rare and refined piece of mid-20th-century jewelry. Featuring a sleek rectangular black onyx inlay and an intriguing design on one shoulder resembling the letter "A" or a combined "A and L" within a square, this ring blends timeless sophistication with a unique geometric motif. Weighing 10.5 grams and measuring size 8 3/4, it makes a bold yet versatile statement.

The ring is in excellent condition for its age, showing only a tiny ding along the bezel and minor wear that enhance its vintage character without detracting from its overall polished appeal. These small details underscore the ring’s history while maintaining its collectible quality.

O.C. Tanner, founded in 1927 in Utah, is celebrated for its fine jewelry and innovative craftsmanship. This ring exemplifies their legacy, combining clean lines and minimalist modernist design with a touch of mystery in its engraved details. Historically, signet rings symbolized identity and prestige, and this piece is no exception, making it both a meaningful heirloom and a striking accessory.

The sterling silver band is sturdy and hallmarked for authenticity, ensuring enduring durability and style. Whether worn as a distinctive personal statement or added to a curated vintage collection, this ring is a timeless testament to retro elegance and craftsmanship.

Item specification

Materials
onyx, silver, sterling, 925, sterling silver
Ring size
8 3/4 US/CA
Adjustable
No
Gemstone
Onyx
Gem color
Black
Band color
Silver
Style
Mid-century
Weight
10.5 g

Details as listed by the shop. Anything not shown wasn't recorded for this piece — ask us and we'll check it by hand.

Will it fit?

Size
US 8.75
Inside diameter
18.7 mm

Fixed size. Do not resize. The heat needed to cut and rejoin the shank damages set stones, and turquoise and inlay in particular will craze, discolour or lift out of the bezel.

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