The Essence of Refined Exploration for Modern Adventurers

The Alsta Watches lineage is forever bound to ocean exploration and cinematic history. This Alsta Nautoscaph IV "Blue Shark" edition is a modern evolution of the iconic alsta dive watch famously worn in the 1975 film Jaws. Crafted in a 40mm brushed 316L stainless steel case, it balances an imposing seafaring heritage with contemporary mechanical luxury, making it a definitive centerpiece for selective watches collections.

Built for collectors searching for elite watches for men nearby, this premium automatic watch men selection features:

• The Blue Shark Dial: A deep, striking marine blue tone that captures the essence of open-ocean pelagic exploration.

• Marine-Grade Build: A 40mm brushed 316L stainless steel case providing extreme durability against salt-water corrosion.

• Deep-Sea Submersibility: Rated for an impressive 999ft / 300m water resistance, featuring a screw-down crown and an anti-reflective sapphire crystal.

• Tactical Night Visibility: Highly visible applied markers and polished classic sword hands filled with high-grade C3 Super-LumiNova for total darkness operations.

• Mechanical Precision: Powered by the ultra-reliable Seiko NH35A automatic movement, boasting shock resistance (ISO 1413) and antimagnetic protection (ISO 764).

Tactical & Versatile Design

The Nautoscaph IV retains the pure soul of a classic skin diver while adjusting to contemporary proportions. The specialized deep blue dial treatment and the black PVD unidirectional bezel bring a sporty edge for the ocean or mountains, while the polished edge finishes make it sophisticated enough for any boardroom or formal setting.

Technical Information

• Movement: Seiko NH35A Automatic (Self-Winding, 24 Jewels)

• Functions: Hours, Minutes, Seconds, and Date Display

• Case: 40mm Brushed 316L Stainless Steel

• Dimensions: 51.3mm lug-to-lug | 20mm lug size | 16.2mm thickness (with crystal)

• Dial: "Blue Shark" Deep Blue with applied high-visibility markers

• Hands: Polished sword hands with C3 Super-LumiNova®

• Bezel: Steel, unidirectional rotating with black PVD insert

• Glass: Scratch-resistant sapphire crystal with Anti-Reflective (AR) coating

• Crown: Screw-down, high-grade stainless steel

• Caseback: Stainless steel with official Alsta shark engraving

• Water Resistance: 999ft / 300m (30 ATM) – Exceeds ISO 6425 dive watch standards