Seiko Cal. 3831 - 477

Released in 1975, the Cal. 3831 with design code 477 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-4dff87ecc3ba]

Also known as: Helmet, Crown

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1975

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