Seiko Cal. 6689 - 640

The Seiko 6689-640 represents an important milestone in Seiko's 1979 lineup. It features a Black dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-098173b06cc3]

Also known as: UFO

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

8.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Black

Jewels

29j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1979

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