Seiko Cal. 6356 - 931

This Spring Drive model from 1999 features a 45mm Hardlex-Coated Steel case. With its 20mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-58d4612af4ce]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1999

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