Seiko Cal. 6643 - 710

The Seiko 6643-710 represents an important milestone in Seiko's 1987 lineup. The Fixed bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-ab329edd6cdb]

Also known as: Helmet, Sea Horse

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

42mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

70m

Dial Color

White

Jewels

18j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1987

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