Seiko Cal. 5231 - 656

The Seiko 5231-656 represents an important milestone in Seiko's 1981 lineup. With its 22mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-b55791b9ecb8]

Also known as: Bullhead, Emperor

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

White

Jewels

33j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1981

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