At the heart of this Nautilus is its beautiful blue Sigma dial. The rich blue surface changes character with the light, shifting between deeper, understated tones and brighter hues when caught by the sun. Beyond its visual appeal, the dial carries the distinctive Sigma markings, a detail associated with the use of precious metals on its applied hour-markers and hands. The signature, together with the applied gold details, adds another layer of interest to an already distinctive configuration.

The accent on the second “E” in “Genève” is a particularly interesting detail on this Nautilus. Found on a limited number of early examples, this subtle variation in the dial signature is associated with earlier production and is less commonly encountered than the standard unaccented version. While its exact production numbers remain undocumented, the detail adds a distinctive touch of character and collector appeal, especially when paired with the blue Sigma dial.

Another very important detail worth a closer look is the black date disc.

Early examples of the Nautilus 3800 are known with this configuration, which creates a particularly harmonious appearance against the blue dial. Later examples are more commonly encountered with a white date disc, making the black version an appealing feature for aficionado's interested in the finer variations found throughout the production of the reference. It is precisely these seemingly minor details that can make the difference between an attractive Nautilus and an example with a more 'simple' character.

The Patek Philippe Nautilus ref. 3800/1 remains an important chapter in the evolution of the luxury sports watch. In this two-tone configuration, the blue Sigma dial, black date disc, monobloc case and original MK1 deployant clasp combine to create an example with a particularly interesting set of details. For collectors who appreciate early Nautilus references, subtle production variations and the timeless combination of stainless steel and 18k yellow gold, this could be exactly what you are looking for.

In 2025, this Nautilus was fully serviced by the certified Patek Philippe aftersales and will therefor be delivered with an extensive two-years of mechanical warranty, including the Patek Philippe leather watch pouch, Patek Philippe service hang tag, Patek Philippe envelope and Patek Philippe register booklet.