Seiko Cal. 3831 - 665

The Seiko 3831-665 represents an important milestone in Seiko's 1980 lineup. Powered by the 3831 caliber with 33j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-a87dc4b0ca50]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

35mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Burgundy

Jewels

33j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1980

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