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Specifications
Dimensions: 40mm diameter, 51.3mm lug-to-lug, 16.2mm thick (with crystal)
Case Material: High-grade bronze
Water Resistance: 300m (30 ATM), exceeding ISO 6425 dive watch standards
Crown: Screw-down for enhanced underwater security
Anti-Magnetism: Resistant up to 4,800 A/m (ISO 764 compliant)
Bronze Case: Black, White, Porcelana, and Anacapri
Luminescence: C3 Super-LumiNova for superior low-light readability
Movement: Seiko NH35A automatic movement with time and date function
Crystal: Scratch-resistant sapphire
The Nautoscaph is offered with carefully selected straps that enhance both its character and versatility. The stainless steel models come fitted with a steel bracelet, evoking the timeless aesthetics of classic tool watches, while the bronze medals are paired with hand-made Italian leather straps, carefully chosen to complement the warmth of the case and develop a unique patina over time.
For those seekinhg a more adaptable option, the Orca strap -- a high performance rubber strap inspired by Quint's boat in Jaws -- is available across the range. Every Nautoscaph ordered with the Orca strap comes presented in a beautifully designed travel pouch, offering both protection and refinement when the watch is sporting this ruggedly elegant strap.
Built to Last a Lifetime of Exploration
Two-year warranty covers movement failure and manufacturing defects from date of purchase. Contact service@alstawatch.com if you have a problem with your watch within the warranty period. You may also contact us outside the warranty period to arrange for repairs or regular servicing of your mechanical watch.
Orders may be cancelled within 14 days of the order date for a full refund. After 14 days, cancellations are not accepted as production on your watch will have already begun.
The Nautoscaph line holds a series of lifestyle pieces aimed at the person who wants to seamlessly and effortlessly go from their outdoor activities to their working hours and back into their evening leisure outings without having to change their timepiece.
The romance of the sea, pulling on the urban, professional/creative, affluent, lifestyle diver/sailor etc who wants to have an elegant, robust and beautifully designed timepiece that fits alongside their elegant and beautifully designed other lifestyle items that they covet and enjoy owning.
Built to Last a Lifetime of Exploration
Alsta strives to draw on its heritage and provide best in class skin diver timepieces, focusing on thinness, mechanical precision and elegance of design.
The modern Nautoscaph follows the design language of the original, however, it has taken on some different looks, such as coloured dials and even a bronze case. The elegance of the Nautoscaph has remained even though the dimensions have increased. The ruggedness and waterproofness is at the heart of the Nautoscaph and despite its elegant looks, it is made to withstand the knocks and bumps of any good adventure.
The Nautoscaph started life as a skin diver, and is still a skin diver at heart, although it is rated to withstand professional dive depths. This is where the Nautoscaph will continue to sit in the Alsta line. Tough enough for the mountain face or the ocean and elegant enough for the board room or the dinner table.
By Design
Case High-grade bronze
Strap Hand made Italian leather in brown, blue and black
Dimensions 40mm diameter
51.3mm lug-to-lug
20mm lug size
16.2mm thick (with crystal)
Crown Screw-down, high-grade bronze
Bezel Steel, unidirectional, blue or black ceramic insert
Dial White, Porelana and Anacapri with applied C3 Super-LumiNova indices
Functions: Hours · Minutes · Seconds · Date
Hands Tapered sword hands with C3 Super-LumiNova
Glass Scratch-resistant sapphire crystal
Caseback Stainless steel · Engraved
Water Resistance 999ft / 300m (30 ATM), exceeding SO 6425dive watch standards
Functions: Hours · Minutes · Sconds · Date
Movement Seiko NH35A Automatic
24 jewels · 21,600 vibrations/hour · 41-hour power reserve
±30 seconds/day accuracy
ISO 764 anti-magnetic
Shock resistant
Functions: Hours · Minutes · Seconds - Date display
Functions: Hours · Minutes · Seconds · Date
Case
High-grade bronze
Dimensions
40mm diameter
51.3mm lug-to-lug
20mm lug size
16.2mm thick (with crystal)
Crown
Screw-down, high-grade bronze
Bezel
Steel unidirectional, blue or black ceramic insert
Dial
White, Porcelana or Anacapri with applied C Super-LumiNova indicies
Functions: Hours · Minutes · Seconds · Date
Hands
Tapered sword hands with C3 Super-LumiNova
Glass
Scratch-resistant sapphire crystal
Caseback
Stainless steel · Engraved
Water Resistance
999ft / 300m (30 ATM), exceeding SO 6425 dive watch standards
Date
Movement
Seiko NH3A Automatic
24 jewels
21,600 vibrations/hour
41-hour power reserve
±30 seconds/day accuracy
ISO 764 anti-magnetic
Shock resistant
Functions: Hours · Minutes · Seconds - Date display
Functions: Hours · Minutes · Seconds · Date

