Nautiko | (Open Heart) White

The SEIKNAUT MOD Nautilus Open Heart White blends minimalism with mechanical elegance. The clean silver-white dial features a brushed horizontal texture that reflects light beautifully, giving the watch a refined and contemporary appearance. The open-heart window provides a glimpse into the beating Seiko NH38 automatic movement — a signature detail of the Open Heart series.Crafted from high-grade 316L stainless steel with a fully integrated bracelet, this timepiece offers both durability and modern wrist presence. Perfect for collectors seeking a clean, premium, and versatile everyday watch.

✅ Case Size: 41mm
✅ Case Thickness: 12mm
✅ Case Material: 316L Stainless Steel
✅ Dial: Silver White brushed dial with open-heart window
✅ Crystal: Sapphire crystal with anti-reflective coating
✅ Movement: Seiko NH38 Automatic (open-heart)
✅ Water Resistance: 5 ATM (50 m)
✅ Bracelet: Integrated stainless steel bracelet
✅ Bracelet Color: Silver
✅ Lug Width: 22mm
✅ Caseback: Exhibition (open) stainless steel
✅ Functions: Hours, minutes, seconds

Processing Time: 2–4 business days
Standard Shipping: 7–12 business days
Express Shipping: 3–7 business days
Worldwide tracking included

Each watch is made to order. Assembly takes 3–5 business days before dispatch; delivery typically takes an additional 7–15 business days.

Tracked worldwide shipping is free. Read the destination details in our shipping policy.

Return conditions and exceptions for custom orders are explained in our returns policy.

Your custom watch includes a 2-year warranty. See the coverage and conditions in our warranty policy.

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