Seiko Cal. 6630 - 388

The Seiko 6630-388 represents an important milestone in Seiko's 1981 lineup. It features a White dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-cb16ea768d64]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

44mm

Case Thickness

12.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

White

Jewels

24j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1981

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