Seiko Cal. 5631 - 233

The Seiko 5631-233 represents an important milestone in Seiko's 1988 lineup. It features a Green dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-173479fc4abb]

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

35mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1988

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