Seiko Cal. 5231 - 237

This Spring Drive model from 1992 features a 39mm Titanium case. With its 20mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-ade83ab2f56b]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1992

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