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Seikonaut All Black Open Heart Style | Dial 40mm Black, Open-Heart | Seiko Mod
$250.00
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✓ Estimated Delivery
September 12, 2025
September 12, 2025
Description
The Seikonaut All Black Open Heart is a striking Seiko Mod, blending the iconic Nautilus style with an open-heart design. Powered by the Seiko NH38 automatic movement, it features a PVD-coated stainless steel case, luminous indices, sapphire crystal, and integrated bracelet with alternative rubber strap. Hand-assembled by professional watchmakers, it comes with a luxury leather case, tools, and a 2-year warranty for peace of mind.
Features
Material
316L Stainless Steel with Black PVD Coating
Diameter 40 mm
Finish Durable, lifetime-lasting coating
Style Open Heart (exposing Seiko’s balance wheel)
Color Black, with Nautilus-inspired horizontal pattern
Indices Applied, luminous (C3 lume)
Type Sapphire Crystal
Notes Solid construction for added protection
Technical Data
Diameter
40 mm
Jewels
24
Frequency
21,600 bph
Power Reserve
41 hours
Water Resistance
50 meters
Crown
Screw-down
Frequency
21,600 bph
Power Reserve
41 hours
Bracelet
Bracelet: Integrated stainless steel bracelet with butterfly clasp
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Specialisations
Black Open Heart with horizontal lines
About the brand
Questions
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At Lamhae, we believe time is more than numbers — it’s a statement. Our watches combine timeless design with modern precision to complement every moment.
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