Omega seamaster 120 ref. 2506.80, Jacques mayol 2000

ncreasingly scarce and highly collectible, the Omega Seamaster 120 ref. 2506.80 with its full dolphins-pattern dial is one of the most distinctive and charming Seamasters of its era.

For sale is an Omega Seamaster 120 ref. 2506.80, caseback stamped SR80060246, offered here as a complete full set.

This example was retailed by Jacques Mayor, the storied Swiss jeweler, and is accompanied by its full complement of original packaging and papers, including warranty card, booklets, and boxes. While a significant number of Seamaster 120 dolphins-dial models were delivered to the Japanese market, Swiss-delivered sets with this provenance are substantially rarer.

The highlight is the deep blue dial embossed with a full pattern of dolphins, creating a surface that comes alive with shifting textures under the light — a playful yet refined design that sets it apart within Omega’s catalog. At 36mm, the stainless steel case is well-balanced, versatile, and perfectly suited for daily wear or collection.

At its heart is the Omega caliber 1120, a chronometer-certified automatic movement based on the ETA 2892-A2, operating at 28,800 vph with a 44-hour power reserve. Renowned for its reliability, precision, and serviceability, it remains one of the strongest calibers of its generation.

Technical oversight
– Reference: 2506.80
– Case: 36mm stainless steel
– Dial: Blue dolphins-pattern motif, applied indexes, luminous hands
– Crystal: Sapphire
– Movement: Omega caliber 1120, chronometer-certified automatic, 28,800 vph, 44h power reserve
– Bracelet: Stainless steel with folding clasp
– Water resistance: 120m
– Delivery: Jacques Mayor Switzerland (parallel delivery also seen in Japan)

Condition is excellent, with sharp case geometry, crisp facets, and a clean dial showing no loss of definition to the dolphin embossing. Bracelet shows only light, careful wear. The movement has been inspected, is running within specification, and the watch is backed by a 2-year warranty.

A rarely seen and highly distinctive Seamaster 120 dolphins-pattern dial, here offered as a complete Jacques Mayor-delivered set — the kind of watch that continues to gain recognition among collectors for its charm, originality, and relative scarcity.