Seiko Prospex MARINEMASTER 300 MM300 SLA021J1

SEIKO PROSPEX AUTOMATIC DIVER'S COMMEMORATION MARINEMASTER 1968

Since 1965, Seiko has continued to push the limits of dive watches. Today, this glorious history is celebrated by the new Prospex diver's watch, which commemorates the 1968 diver's watch and sports the same features. Durability and resistance are the hallmarks of this watch: the zirconium oxide ceramic bezel is shock and scratch resistant, the stainless steel case has a scratch-resistant coating, while the sapphire crystal has an anti-reflective treatment on both sides .

External components

Case: stainless steel with anti-scratch treatment, monobloc

Crown: screw-down stainless steel

Bezel: Black zirconium oxide ceramic

Glass: domed sapphire with anti-reflective treatment on both sides

Dial: black

Index: lumibrite

Hands: lumibrite

Bracelet: stainless steel with anti-scratch treatment, and replacement strap in black silicone

Buckle/clasp: folding buckle with adjustable safety button

Water resistance: 300 m for saturation diving

Magnetic resistance: 16,000 A/m

Thickness: 15.4 mm

Diameter: 44.3 mm

Movement

Caliber: 8L35

Functions: 3 hands – Date – Manual winding possible

Power reserve: 50 hours at full charge

Frequency: 28,800 vibrations per hour