Seiko Cal. 6187 - 988

The Seiko 6187-988 represents an important milestone in Seiko's 1977 lineup. The Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-493d02c2e21d]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1977

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