Seiko Cal. 6689 - 375

The Seiko 6689-375 represents an important milestone in Seiko's 1971 lineup. Powered by the 6689 caliber with 17j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-84c364bcec5f]

Also known as: Bullhead, UFO

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

17j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1971

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