Tiffany & Co. Eternity 28mm Diamond Watch, 18K Rose Gold, Black Dial, Full Set, 2026

Heritage

The Tiffany & Co. Eternity watch is among the most jewel-forward expressions in the house's storied watchmaking tradition — a piece that exists at the precise intersection of haute joaillerie and fine horology. The cushion-shaped case in 18k rose gold carries the Eternity's defining character: a diamond-set bezel encircling a black lacquered dial where twelve individually hand-set diamonds — each a different cut — replace conventional hour markers with a collector's compendium of the jeweller's art. The diamond-set crown and diamond-set buckle complete a watch that was never intended to simply tell time. Reference 2N3120003 arrives new with box and papers, a current piece in active production. Scarcity here is not manufactured. It is earned.

Design

The 28mm cushion-shaped case in 18k rose gold presents a bezel set with round brilliant diamonds framing a black lacquered dial with twelve hand-set diamonds in twelve distinct cuts: round brilliant, baguette, cushion, Tiffany True®, marquise, Asscher, heart, pear, oval, emerald, triangular, and princess. 1.63 carats total weight. The diamond-set crown at 3 o’clock adds a final jewelled flourish. A black brushed calf leather strap with an 18k rose gold buckle set with 10 round brilliant diamonds completes the composition. Swiss quartz movement. 30m water resistance.

Collector's Note

The Tiffany Eternity in rose gold with full diamond setting and black lacquered dial occupies a singular position in the fine watch market — equally coveted by serious jewellery collectors and watch connoisseurs who understand that no two hour markers are alike. New with papers at a significant discount to retail. Those who move first claim the best positions.

Technical Specifications

Designer: Tiffany & Co.
Model: Eternity 28mm Diamond Watch
Reference: 2N3120003
Manufacturer SKU: 73580811
Year: 2026
Case Shape: Cushion
Case Material: 18K Rose Gold (Au 750)
Case Diameter: 28mm (without crown); 30mm (with diamond crown)
Bezel: Round brilliant diamond-set 18K rose gold
Dial: Black lacquered with 12 hand-set diamonds (one of each: round brilliant, baguette, cushion, Tiffany True®, marquise, Asscher, heart, pear, oval, emerald, triangular, princess)
Crown: Round brilliant diamond-set rose gold
Strap: Black brushed calf leather
Buckle: 18K rose gold set with 10 round brilliant diamonds
Total Diamond Weight: 1.63 CTW
Movement: Swiss Quartz
Complications: Hours, Minutes
Water Resistance: 30m / 100ft / 3 ATM
Origin: Swiss Made
Gender: Unisex
Authenticity: Independently verified before listing

Included With Purchase

Full set — original Tiffany & Co. box, papers, and all accessories included. New, unworn.

Photography & Representation

Every effort has been made to accurately represent this item through high-resolution photography and detailed cataloging. The photographs form part of the lot description and should be reviewed carefully, as they depict the item's condition, characteristics, and included accessories. Additional photographs are available upon request.

Authenticity Guarantee

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Brand Disclaimer

Tiffany & Co. is a registered trademark of Tiffany and Company. Authentique Lux is not affiliated with, endorsed by, or sponsored by Tiffany & Co.