Seiko Cal. 3863 - 673

The Seiko 3863-673 represents an important milestone in Seiko's 1975 lineup. Powered by the 3863 caliber with 36j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-beaa6aecf404]

Also known as: World Timer, Sea Horse

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1975

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