Seiko Cal. 6231 - 747

Released in 1986, the Cal. 6231 with design code 747 was part of Seiko's domestic market collection. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-063de064afbd]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

9.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1986

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