Seiko Cal. 5631 - 461

This Quartz model from 1973 features a 36mm Hardlex-Coated Steel case. Powered by the 5631 caliber with 31j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-57e2d713ba6d]

Also known as: Silverwave, Golden Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

31j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1973

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