Seiko Cal. 3831 - 565

The 3831-565 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3831 caliber with 29j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-f69c858b463d]

Also known as: Sumo, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Navy

Jewels

29j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1999

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