Seiko Cal. 6331 - 689

The Seiko 6331-689 represents an important milestone in Seiko's 1977 lineup. Powered by the 6331 caliber with 27j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-df67126ff6c2]

Also known as: Tuna, Pogue

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

White

Jewels

27j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1977

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