Seiko Cal. 6689 - 364

The Seiko 6689-364 represents an important milestone in Seiko's 1975 lineup. The Fixed bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-0440c2d5908c]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

60m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1975

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