Seiko Cal. 3831 - 788

The Seiko 3831-788 represents an important milestone in Seiko's 1975 lineup. Powered by the 3831 caliber with 34j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-86a0a87b6047]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Cream

Jewels

34j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1975

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