Seiko Cal. 5231 - 664

The Seiko 5231-664 represents an important milestone in Seiko's 1991 lineup. It features a Black dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-ad792c54b3fd]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

34mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1991

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