The Patek Philippe reference 3800 occupies a significant place in the history of the Nautilus collection, introducing a more versatile mid-size case while preserving the iconic design created by Gérald Genta. Introduced in 1981 as the successor to the original reference 3700, the 3800 featured a 37.5mm case and was powered by the automatic Calibre 335 SC, adding a central sweep seconds hand while retaining the date display at 3 o'clock. Its distinctive porthole-inspired bezel, integrated bracelet and horizontally embossed dial maintained the unmistakable identity of the Nautilus while appealing to a broader audience.

Produced in stainless steel, yellow gold, two-tone steel and gold, white gold and rose gold, together with a variety of dial colours and rare gem-set versions, the reference 3800 remained in production for more than two decades. Celebrated for its balanced proportions, exceptional wearability and enduring design, the 3800 has become one of the most sought-after vintage Nautilus references, admired by collectors as the model that successfully bridged the gap between the original Jumbo and the modern Nautilus generation.