Seiko Cal. 3831 - 557

This Automatic model from 1969 features a 36mm Hardlex-Coated Steel case. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-aeb8df9ed2d5]

Also known as: Samurai, Silverwave

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1969

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