Seiko Cal. 3831 - 156

The 3831-156 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3831 caliber with 18j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-6cc69731bfe9]

Also known as: Bellmatic, World Timer

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1991

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