Seiko Cal. 3828 - 631

The Seiko 3828-631 represents an important milestone in Seiko's 1967 lineup. With its 21mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-b39f58fd92db]

Also known as: Shogun, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1967

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