Seiko Cal. 3813 - 940

The Seiko 3813-940 represents an important milestone in Seiko's 1984 lineup. Powered by the 3813 caliber with 25j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-848571817a40]

Also known as: Samurai, Bullhead

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

41mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Black

Jewels

25j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1984

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