Seiko Cal. 6639 - 414

The Seiko 6639-414 represents an important milestone in Seiko's 1987 lineup. With its 21mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-bff7bd0d63c0]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

41mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1987

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