Seiko Cal. 3813 - 641

The Seiko 3813-641 represents an important milestone in Seiko's 1984 lineup. With its 21mm lug width and 14.6mm profile, it sits comfortably on most wrists. [seikata-wm-9499ca47e43c]

Also known as: Sportsmatic, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

14.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

34j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1984

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