Seiko Cal. 6331 - 816

This Spring Drive model from 1992 features a 34mm Hardlex-Coated Steel case. With its 21mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-9010a2f57f93]

Also known as: Bullhead, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1992

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