Seiko Cal. 5677 - 186

The Seiko 5677-186 represents an important milestone in Seiko's 1980 lineup. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-13f9e6b1a147]

Also known as: UFO, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

17j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1980

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