Seiko Cal. 3821 - 987

This Spring Drive model from 1966 features a 42mm Stainless Steel case. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-3c8c1e5a63d5]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Champagne

Jewels

24j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1966

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