Seiko Cal. 6687 - 403

The Seiko 6687-403 represents an important milestone in Seiko's 1966 lineup. The Fixed bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-06138bd0595c]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

34mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Black

Jewels

25j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1966

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