Seiko Cal. 5631 - 189

The 5631-189 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5631 caliber with 21j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-62f1dd422cde]

Also known as: Samurai, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

30m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1990

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