Seiko Cal. 5638 - 503

The Seiko 5638-503 represents an important milestone in Seiko's 1973 lineup. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-a2e24c7f57a5]

Also known as: Silverwave, Baby Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Champagne

Jewels

31j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1973

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