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The Nautoscaph IV features a unidirectional bezel, removing the risk of it being accidentally turned while underwater, which could result in a fatal miscalculation of dive time. It is manufactured and tested to withstand the pressure of
depths of 999ft (300m or 29atm). The original Nautoscaph had 999ft on its dial, a touch we loved and therefore kept.
For the Nautoscaph IV, we have introduced our 'Valencia' beads-of-rice bracelet to complement the piece.
Every component of Alsta timepieces is manufactured in Switzerland, including a Seiko NH35A movement. The watches are assembled, tested and quality-passed in Switzerland. Affordable quality engineering, manufacturing and design will always be a hallmark of Alsta watches.
Like all of our Nautoscaph releases, we make all possible technical, safety and performance improvements while retaining as much of the original designs as possible. Our beautifully styled Alsta timepieces ooze the same romance
and charm of the originals. The main differences are modern-day materials and technology. Like the originals, they are powered by quality automatic movements.
Case: 316L Marine grade brushed stainless steel
Dimensions: 40mm diameter case, 51.3mm lug to lug, 20mm lug size, 16.2mm thickness including crystal, 43.4mm width including crown, 217.8mm total length including opened-out bracelet. Packaging – L 118.5mm W 96mm H 74mm
Weight: 158g unpackaged. 365g packaged.
Crown: Screw down, polished stainless steel
Bezel: PVD-coated steel, unidirectional
Dial: Matte black with applied C3 Super-LumiNova
Hands: Tapered sword with C3 Super-LumiNova. Orange seconds hand with C3 Super-LumiNova insert.
Movement: Automatic Seiko NH35A, 24 jewels.
Functions: Hours, minutes, seconds, date
Caseback: Stainless steel, engraved
Glass: Sapphire crystal
Shock Resistance: ISO 1413
Anti-magnetic: Field strength of 4,800 A/m (ISO 764 compliant)
Bracelet: Alsta “Valencia” bracelet with safety deployant clasp. 20mm at end tapering to 17.7mm
Serialization Numbering: #xxx/400