Seiko Cal. 7155 - 331

The Seiko 7155-331 represents an important milestone in Seiko's 1969 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-1803266b72a5]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

42mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Champagne

Jewels

17j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1969

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