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The Audemars Piguet Royal Oak Quantième PerpĂ©tuel has been one of the brand’s most admired and sought-after models since the mid-1980s. While most examples were produced with either a 36 mm or 39 mm case, the present example, reference 25800, features a refined 33 mm case, offering a perfect balance of elegance, wearability, and technical sophistication.

Introduced in 1996 and produced for only four years, until 2000, reference 25800 is among the smallest perpetual calendar wristwatches ever made. Most likely conceived with the Japanese market in mind, it represents an impressive mechanical achievement, as fitting an automatic perpetual calendar movement inside such a compact case is an extremely challenging task.

The model was produced in only 98 examples across three different metals:

Several dial variations were created during the short production run, making each piece particularly rare and collectible. The present example features a beautiful and warm champagne dial, which perfectly complements the yellow gold case.

Despite its smaller diameter, the case retains a substantial thickness, allowing the watch to maintain a strong presence on the wrist while remaining elegant and highly wearable.

The watch is powered by the automatic calibre 2141/2806 and is preserved in excellent overall condition.

The Rolex GMT-Master reference 16753 was introduced in 1980 alongside the 16750 in steel and the 16758 in full yellow gold, marking a key evolution of the GMT-Master line. Compared to the preceding 1675, the main upgrade was the new automatic Caliber 3075, featuring a higher beat rate and, most importantly, a quickset date function. Despite the technical improvement, the 16753 retained the acrylic crystal, preserving the vintage character of the earlier generation. Unlike the full gold 16758 — which already adopted a sapphire crystal — the 16753, together with the steel 16750, represents the last GMT-Master generation with a strong visual link to the classic 1675 era.

The present example is a highly attractive “Root Beer” configuration in stainless steel and yellow gold. It features the desirable brown dial with applied yellow gold “nipple” hour markers, whose raised conical shape adds depth and warmth, perfectly matching the gilt hands and brown and gold bezel insert. The overall aesthetic remains one of the most charismatic within the vintage GMT-Master family.

This watch boasts a flawless dial and an untouched case, preserved in excellent overall condition, making it a particularly appealing example of this collectible reference.

The Mercator was introduced in 1994 as one of the most imaginative creations of Vacheron Constantin’s modern era, conceived to celebrate the legacy of the great 16th-century cartographer Gerardus Mercator and to showcase the Maison’s mastery of alternative time displays and decorative arts. Produced in limited numbers over approximately a decade, the model is distinguished by its bi-retrograde indication and elaborate map dials, making it one of the most artistic and unconventional wristwatches of the 1990s.

The present yellow gold Mercator features a dial depicting a finely detailed cartographic representation of Asia, Africa, and Europe, inspired by Mercator’s historic world maps. The continents are rendered with remarkable depth and precision, creating a miniature work of art on the wrist. The time is displayed through two compass-shaped retrograde hands: the upper arc indicates the hours, while the lower arc marks the minutes, each hand gracefully returning to zero at the end of its cycle. 

The watch is powered by the ultra-thin self-winding Caliber 1120, adapted to drive the complex bi-retrograde mechanism — a technically demanding system that requires absolute precision to ensure smooth travel and instantaneous return of the hands.

Overall, the watch is preserved in excellent condition, and it is accompanied by its original box, papers and signed loupe. 

Ebel is a historic brand founded in 1911, but it gained particular cultural significance under the leadership of Pierre-Alain Blum, from the late 1970s through the 1990s. During that period, while the watch industry was facing the quartz crisis, Ebel managed to stand out by introducing innovative models with significant impact, successfully combining refined design with strong mechanical credibility.

Among the most notable creations of this era were Ebel’s automatic chronographs powered by the legendary Zenith El Primero. Rather than relying on modular constructions, Ebel chose the high-frequency, fully integrated El Primero caliber, a choice that significantly elevated the brand’s standing in the luxury sport segment.

The present example from the Ebel 1911 Chronograph collection features a stainless steel and yellow gold case with the bezel secured by the brand’s signature exposed screws. The silvered dial with applied Roman numerals and tri-compax chronograph layout is both elegant and well balanced, complemented by a discreet date display. A defining hallmark is the integrated two-tone “wave” bracelet, whose fluid, undulating links create a seamless extension of the case and provide exceptional comfort.

Overall, the watch is preserved in excellent condition, making it a particularly appealing example from Ebel’s golden era.

The Reference 3945 was introduced alongside the iconic 3940 and shares the same technical architecture but stands apart thank to its integrated bracelet and lugless case design. Produced between 1985 and 2007 over three series, the reference was available in all precious metals. Total numbers were lower than those of the 3940, making the 3945 a comparatively rarer and more discreet choice among collectors who appreciate its distinctive design and understated sophistication.

The present watch is a second-series example. In this generation, the dial evolved from the earlier configuration: the subdials are no longer sunken as seen in the first series, but instead are defined by elegant beveled edges and it also features the introduction of the cross for the leap year indication. This particular piece is housed in a white gold case and fitted with an opaline dial. According to the Extract from the Patek Philippe Archives, the watch was produced and sold in 1991.

The watch is powered by the ultra-thin self-winding Caliber 240 Q, one of Patek Philippe’s most respected perpetual calendar movements, 

Overall, the watch is preserved in very good condition, with well-defined case lines and a bracelet that remains strong and cohesive, making it an especially appealing example of this elegant and relatively uncommon reference.