Seiko Cal. 6635 - 784

The Seiko 6635-784 represents an important milestone in Seiko's 1988 lineup. With its 21mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-b859f254ceeb]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1988

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