Seiko Cal. 6155 - 731

This Spring Drive model from 1987 features a 43mm PVD Black case. The Fixed bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-e2d951f3c21f]

Also known as: Crown, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

70m

Dial Color

Black

Jewels

26j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1987

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