Seiko Cal. 5631 - 346

This Spring Drive model from 1996 features a 34mm Hardlex-Coated Steel case. Powered by the 5631 caliber with 19j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-e3a2bbdbc040]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1996

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