Tonneau Skeleton Automatic Watch – Seiko NH05, 5 ATM

Discover mechanical engineering from every angle with the Tonneau Skeleton Automatic Watch, a bold contemporary timepiece built around an exposed mechanical architecture and distinctive curved case.

At its heart is a Seiko NH05 automatic mechanical movement, visible through the open-worked skeleton design. The substantial 50 × 42 mm (2 × 1.7 in) tonneau-shaped case, reinforced mineral glass and comfortable silicone strap create a striking combination of mechanical character and modern sport styling.

No battery. No conventional dial hiding the mechanism. Just mechanical watchmaking on display.

⚙️ Seiko NH05 Automatic Movement

The watch is powered by the Seiko NH05 automatic mechanical movement, combining traditional mechanical watchmaking with everyday convenience.

The movement uses the natural motion of your wrist to maintain its power during regular wear, eliminating the need for a conventional battery.

For watch enthusiasts, the real attraction is being able to see the mechanical architecture operating directly beneath the crystal.

🔩 Full Skeleton Design

Instead of hiding the movement behind a conventional dial, the open-worked skeleton construction makes the mechanism an integral part of the watch's appearance.

Gears, bridges and mechanical components create a highly technical three-dimensional display that changes depending on the viewing angle.

It's not simply a watch with a skeleton detail — the mechanism defines the entire design.

⌚ Bold Tonneau-Shaped Case

The unconventional tonneau-shaped case gives the watch its unmistakable contemporary character.

Measuring approximately 50 mm (2 in) long × 42 mm wide, it provides substantial wrist presence and complements the complex mechanical architecture underneath.

With a thickness of approximately 21 mm (0.8 in), this is intentionally a bold statement watch rather than an ultra-thin dress watch.

🛡️ Steel Case Construction

The movement is housed inside a steel case, providing a solid structure around the exposed mechanical design.

The sculpted case shape, metallic finishing and visible mechanics combine sport-inspired aesthetics with a more sophisticated mechanical character.

💎 Reinforced Mineral Glass

The skeleton mechanism is protected by reinforced mineral glass, providing durability for regular everyday use while maintaining a clear view of the intricate movement underneath.

🖤 Comfortable Silicone Strap

A 22 mm (0.9 in) silicone strap complements the modern case while providing flexibility and comfort on the wrist.

Its sporty character balances the substantial dimensions of the watch and makes it suitable for regular wear.

💧 5 ATM Water Resistance

With 5 ATM / 50M water resistance, the watch provides protection against rain, splashes and everyday exposure to water.

Avoid operating the crown or controls while the watch is wet, and do not use it for diving.

📏 Specifications

• Movement: Seiko NH05 Automatic Mechanical
• Power: Automatic Self-Winding
• Battery Required: No
• Dial: Full Skeleton / Open-Worked
• Case Shape: Tonneau
• Case Material: Steel
• Case Length: Approx. 50 mm (2 in)
• Case Width: Approx. 42 mm (1.7 in)
• Case Thickness: Approx. 21 mm (0.8 in)
• Crystal: Reinforced Mineral Glass
• Strap Material: Silicone
• Strap Width: Approx. 22 mm (0.9 in)
• Clasp: Pin Buckle
• Water Resistance: 5 ATM / 50M
• Display: Analog
• Style: Skeleton / Mechanical / Sport / Statement
• Gender: Men

Dimensions are measured manually and may vary slightly.

🎁 Mechanical Engineering on Your Wrist

This timepiece is made for people who want to see more than just the time.

Its combination of a Seiko automatic movement, exposed skeleton architecture and bold tonneau case makes it an excellent choice for mechanical watch enthusiasts and collectors of unconventional designs.

Whether worn as an everyday statement piece or added to a collection, it's a watch designed to attract attention from across the room — and reward a closer look.

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