Seiko Cal. 3818 - 331

This Spring Drive model from 1999 features a 37mm Two-Tone case. With its 21mm lug width and 14.1mm profile, it sits comfortably on most wrists. [seikata-wm-2edd7005383e]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1999

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