Seiko Cal. 6231 - 135

The Seiko 6231-135 represents an important milestone in Seiko's 1989 lineup. With its 18mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-8de5e5584b49]

Also known as: Bellmatic, Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1989

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