Seiko Cal. 3813 - 984

This Automatic model from 1970 features a 38mm Stainless Steel case. With its 18mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-cc45e792ce8e]

Also known as: Sumo, Helmet

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Cream

Jewels

31j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1970

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