Seiko Cal. 6647 - 312

The Seiko 6647-312 represents an important milestone in Seiko's 1990 lineup. With its 21mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-cedd73ac6ac2]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Burgundy

Jewels

27j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1990

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