Seiko Cal. 5638 - 668

The 5638-668 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5638 caliber with 25j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-2de317e1e5d9]

Also known as: Rally

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

9.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1985

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