Seiko Cal. 6630 - 990

The Seiko 6630-990 represents an important milestone in Seiko's 1984 lineup. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-9b2fe4305a13]

Also known as: Bullhead, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1984

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