Seiko Cal. 5681 - 691

The Seiko 5681-691 represents an important milestone in Seiko's 1976 lineup. The Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-60a7679d4cc3]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

32j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1976

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