Introduced in the early 1980s, the Patek Philippe Nautilus ref. 3800/1 was the first mid-sized version of the original Nautilus 3700 from 1976. With a 37.5mm case diameter, it was designed to appeal to those who found the original “Jumbo” 3700 too large. Despite the smaller case, the 3800 retained all the key design elements of Gérald Genta’s original vision—the signature rounded octagonal bezel, horizontally embossed dial, and integrated bracelet.

This example features a sigma dial, indicated by the small “σ Swiss σ” markings at 6 o’clock. These symbols denote that the hour markers and hands are made of gold. Another notable feature is the black date disc with white numerals, which was primarily used on early production runs of this reference before Patek Philippe transitioned to a white date disc.

Powering this watch is the Patek Philippe Caliber 335 SC, a significant evolution from the Jaeger-LeCoultre-based Caliber 28-255C used in the original 3700. Unlike its predecessor, the 335 SC features a central seconds hand (“SC” for “Seconde Centrale”).

Notably, the piece offered here is the gold and steel variant, accompanied by its original box and certificate dated December 20, 1984. Over time, the dial has developed a slight greenish hue, rather than a pure blue, which imparts a distinctive and appealing character to this classic Nautilus.