Seiko Cal. 5681 - 403

This Spring Drive model from 1967 features a 34mm Two-Tone case. With its 21mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-c78bce05790e]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1967

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