Seiko Cal. 3821 - 920

This Quartz model from 1977 features a 46mm Hardlex-Coated Steel case. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-42e5e9d9f914]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Champagne

Jewels

34j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1977

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