Seiko Cal. 3831 - 103

The Seiko 3831-103 represents an important milestone in Seiko's 1978 lineup. Powered by the 3831 caliber with 22j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-9ea152c0e49b]

Also known as: Sumo, Silverwave

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

190m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1978

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