Seiko Cal. 5240 - 830

The 5240-830 is a sought-after Automatic piece from Seiko's golden era. It features a Navy dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-f423775c9315]

Also known as: Samurai, Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1989

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