Seiko Cal. 6691 - 400

The Seiko 6691-400 represents an important milestone in Seiko's 1987 lineup. It features a Black dial protected by a Acrylic crystal and offers 80m of water resistance. [seikata-wm-796b3f52773d]

Also known as: Tuna, Rally

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

36mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

80m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1987

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