Seiko Cal. 6331 - 726

The Seiko 6331-726 represents an important milestone in Seiko's 1975 lineup. With its 18mm lug width and 12.4mm profile, it sits comfortably on most wrists. [seikata-wm-b88f4a921ec7]

Also known as: Tuna, Pogue

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

12.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1975

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