Seiko Cal. 3821 - 256

The Seiko 3821-256 represents an important milestone in Seiko's 1978 lineup. It features a Silver dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-0e0d02e5e251]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

41mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

28j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1978

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