Seiko Cal. 6631 - 670

The Seiko 6631-670 represents an important milestone in Seiko's 1995 lineup. Powered by the 6631 caliber with 30j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-b86cbf0ec9f9]

Also known as: Goldfeather

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1995

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