Seiko Cal. 3831 - 336

The Seiko 3831-336 represents an important milestone in Seiko's 1981 lineup. Powered by the 3831 caliber with 27j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-3ae019b9af71]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Silver

Jewels

27j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1981

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