Seiko Cal. 3869 - 634

This Spring Drive model from 1970 features a 40mm Two-Tone case. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-3e60861ba2e8]

Also known as: Sumo, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1970

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