Seiko Cal. 3831 - 650

The Seiko 3831-650 represents an important milestone in Seiko's 1980 lineup. Powered by the 3831 caliber with 27j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-3b3c84218bec]

Also known as: Flighty

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

27j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1980

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