Seiko Cal. 6631 - 487

The 6631-487 is a sought-after Quartz piece from Seiko's golden era. It features a Burgundy dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-d5e40617bc4a]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Burgundy

Jewels

24j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1984

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