Seiko Cal. 5231 - 151

This Hand-Winding model from 1986 features a 45mm Hardlex-Coated Steel case. With its 18mm lug width and 12.3mm profile, it sits comfortably on most wrists. [seikata-wm-a3cc8cefa8d2]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

12.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1986

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