Seiko Cal. 5638 - 688

This Solar model from 1975 features a 37mm Hardlex-Coated Steel case. Powered by the 5638 caliber with 34j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-e4ef8253a478]

Also known as: Rally, World Timer

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Champagne

Jewels

34j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1975

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