Patek Philippe 3800/1JA Nautilus 18K Yellow Gold / SS Blue Dial

This Patek Philippe Nautilus reference 3800/1JA is the midsize expression of the design, keeping the line's proportions in a trimmer format than the full-size 3700 it followed. Its automatic movement keeps the mechanics understated, which suits a reference valued more for configuration and profile than for complication. In stainless steel and yellow gold, the case measures 37.5mm by 37.5mm and 7.4mm thick, a notably slim build that gives the watch much of its appeal in wear. That two-tone treatment marks a distinct turn from the original steel-only idea of the Nautilus and gives this reference a different place in the family. The blue dial provides the cool counterpoint that this configuration needs. For a collector drawn to early Nautilus references but not set on the Jumbo, this is the one that preserves the character without the larger footprint. It shows how quickly Patek understood that the Nautilus could carry more than one identity. This Nautilus was just fully serviced in Geneva by Patek Philippe in Q4/2026.