Seiko Cal. 5638 - 660

The Seiko 5638-660 represents an important milestone in Seiko's 1979 lineup. The Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-c2a536ba592d]

Also known as: Silverwave, Emperor

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1979

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