Alsta Nautoscaph IV
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.
Weight 158g unpackaged. 365g packaged.
Case 316L Marine grade brushed stainless steel
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 with AR coating on the inside
Water resistance 999ft/300m
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
Strap bars Spring-loaded stainless steel
Serialisation Numbering #xxx/400
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