Seiko Cal. 3831 - 640

The 3831-640 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 3831 caliber with 19j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-01c2bede0f0b]

Also known as: Samurai, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Green

Jewels

19j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1992

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