Seiko Cal. 6231 - 831

The Seiko 6231-831 represents an important milestone in Seiko's 1971 lineup. The Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-aaaa5fe0dc0a]

Also known as: Turtle, Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

14.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

32j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1971

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