Seiko Cal. 5251 - 637

This Hand-Winding model from 1970 features a 36mm Two-Tone case. With its 19mm lug width and 14.5mm profile, it sits comfortably on most wrists. [seikata-wm-8f265f4b8c7d]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Black

Jewels

36j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1970

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