Seiko Cal. 6628 - 633

The Seiko 6628-633 represents an important milestone in Seiko's 1980 lineup. With its 19mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-4773efd7e4f1]

Also known as: Monster, Silverwave

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1980

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