March 15, 2026
Brand: Patek Philippe
Model: Nautilus 3800/1 "MK1"
Year: 1984
Case: 37,5mm
Material: Steel
Dial: Blue
Functions: Hours, Minutes and Date
Movement: Cal. 335 SC, Automatic
Bracelet/Strap: Integrated steel bracelet
Accessories: Box and Papers Original
Warranty: 24 Months
There are many reasons why the Patek Philippe Nautilus has achieved legendary status. Beyond the prestige of the brand and the iconic design signed by Gérald Genta, what truly sets this watch apart is the remarkable variety of versions produced over the years—often distinguished by the smallest of details.
A few years after launching the Nautilus Ref. 3700, Patek Philippe introduced the mid-size model, Ref. 3800, in an effort to boost sales that were slow to take off. With its diameter reduced to 37.5 mm from the original 42 mm, the watch was designed to bring the Nautilus aesthetic to a broader audience. Its more versatile size, combined with a wider range of configurations, made it an appealing alternative from the start. The piece featured here is a Ref. 3800 from 1984, crafted in stainless steel with a blue dial and black date disc. Its most intriguing feature lies in the dial, one of the so-called “Sigma Dials,” identified by the Greek letter σ flanking the word SWISS at 6 o’clock. There are three known variations of this signature: “σ · SWISS · σ”, “σ SWISS σ”, and simply “SWISS.” The presence of the sigma symbol indicates the use of gold elements on the dial, such as the applied hour markers. This convention was established by the Association pour la Promotion Industrielle de l’Or, a group of Swiss watchmakers who introduced the symbol to highlight the use of precious materials and enhance the perceived value of a watch.
This Nautilus Ref. 3800 is powered by the automatic caliber 335 SC, beating at 28,800 vibrations per hour. This early version lacks both the Geneva Seal and the Gyromax balance spring. It is believed that this first iteration of the movement was used until 1987, when an updated version with a quick-set date was introduced. Five years later, in 1992, the movement was fully replaced by the 330 SC. The example presented here comes as a full set.