Seiko Cal. 4525 - 638

The Seiko 4525-638 represents an important milestone in Seiko's 1976 lineup. With its 20mm lug width and 8.4mm profile, it sits comfortably on most wrists. [seikata-wm-cdf3fb2c7450]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Navy

Jewels

29j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1976

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