Seiko Cal. 3831 - 912

The Seiko 3831-912 represents an important milestone in Seiko's 1966 lineup. Powered by the 3831 caliber with 24j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-c852c7aad9fa]

Also known as: Helmet, Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1966

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