Seiko Cal. 6687 - 401

The Seiko 6687-401 represents an important milestone in Seiko's 1990 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-7ce5d0dfc401]

Also known as: Shogun, UFO

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1990

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