Seiko Cal. 3816 - 421

The Seiko 3816-421 represents an important milestone in Seiko's 1975 lineup. With its 20mm lug width and 8.1mm profile, it sits comfortably on most wrists. [seikata-wm-d237a26038fc]

Also known as: Sea Horse, Crown

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

36j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1975

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