Seiko Cal. 5687 - 631

The 5687-631 is a sought-after Quartz piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-3f0b1eca8bae]

Also known as: Sumo, Pogue

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1976

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