Seiko Cal. 6691 - 187

The Seiko 6691-187 represents an important milestone in Seiko's 1977 lineup. The Bidirectional bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-323d48ce88a6]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Champagne

Jewels

34j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1977

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