The Nomods Nautilus is a 40 mm solid-dial Seiko mod watch built on our Nautilus-style platform — the solid-dial counterpart to the Nautilus Skeleton. The 316L stainless steel case sits just 9.95 mm thick, giving this watch an ultra-thin profile that wears closer to a dress watch than most Seiko mods. Inside, the Seiko NH35 automatic movement delivers hacking, hand-winding, and a 41-hour power reserve. Sapphire crystal up front, integrated steel bracelet with the signature Nautilus-style links, and 50 m water resistance round out the build. Available in Blue, Rose Gold, and Green Jump to: Blue · Rose Gold · Green Blue — sunburst navy dial Deep navy sunburst with cobalt shifts in angled light. Pairs the cleanest dress aesthetic with the Nautilus integrated bracelet — the most versatile of the three colourways. Rose Gold — warm pink-gold finish Soft pink-gold case treatment with a matching sunburst dial. The dressiest of the three colourways, and the one Spanish-language searchers ask for as oro rosa. Green — sunburst forest dial Forest-green sunburst dial with subtle olive undertones; a less-common Nautilus colourway with quiet character. Specifications Specification Detail Case Size 40 mm Thickness 9.95 mm (ultra-thin) Material 316L Stainless Steel Movement Seiko NH35 (automatic, hacking, hand-winding) Power Reserve Approx. 41 hours Crystal Sapphire Water Resistance 50 m Dial Solid sunburst, 30.8 mm Dial Size 30.8 mm Bracelet Integrated stainless steel, Nautilus-style Caseback Screw-down stainless steel Lume Applied indices with luminous fill Compatibility This is a fully assembled watch built on the Nautilus platform. The modular design allows component swaps: Dial: Pre-installed sunburst 30.8 mm dial — Replaceable with any 30.8 mm dial compatible with NH35/NH36 movements, including our Nautilus Skeleton Dial 30.8mm if you want to switch to a skeleton look. Hands: Pre-installed Nautilus-style hands — Replaceable with any NH-series compatible hands, such as the Royal Oak V1 Silver Hands. What's Included Fully assembled Nomods Nautilus watch in your selected colourway Integrated stainless steel bracelet (pre-installed) Watch box Designed by Nomods The Nautilus 40mm is our own take on the integrated-lug, sport-luxury silhouette. The case is CNC-machined from 316L stainless steel, brushed and polished by hand, and the integrated bracelet flows directly from the lugs — no spring bars, no break in the line. The 9.95 mm thickness keeps the watch slim and wearable for daily use, and the 30.8 mm dial opens up the broader Nomods dial catalogue for future builds. Every watch is checked individually before shipping. Browse Collection Nautilus 40mm Seiko Mod Parts — All Seiko Nautilus Mods — Nautilus Mod Parts Nomods is an independent brand specializing in Seiko-compatible watch modifications. We are not affiliated with, endorsed by, or connected to Seiko, Rolex, Audemars Piguet, Patek Philippe, or any other watch brand mentioned on this site. All brand names and trademarks are the property of their respective owners and are used solely for descriptive and comparative purposes. { "@context": "https://schema.org/", "@type": "Product", "@id": "https://nomods.co/products/seiko-mod-nautilus-40mm#product", "name": "Nautilus 40mm — Seiko Mod Watch", "description": "40mm Nautilus-style Seiko mod watch in three sunburst colorways (Blue, Rose Gold, Green). 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