Seiko Cal. 5631 - 226

The Seiko 5631-226 represents an important milestone in Seiko's 1978 lineup. Powered by the 5631 caliber with 19j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-1df24212d1e1]

Also known as: Monster

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Burgundy

Jewels

19j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1978

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