Seiko Cal. 5640 - 604

This Quartz model from 1971 features a 36mm Stainless Steel case. Powered by the 5640 caliber with 27j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-e807327370e5]

Also known as: Silverwave, Bellmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Champagne

Jewels

27j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1971

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