Seiko Cal. 5657 - 524

The Seiko 5657-524 represents an important milestone in Seiko's 1977 lineup. With its 20mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-21c027961e8b]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1977

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