Seiko Cal. 6631 - 890

The Seiko 6631-890 represents an important milestone in Seiko's 1996 lineup. Powered by the 6631 caliber with 35j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-8a4a3ce92326]

Also known as: Sumo, Emperor

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1996

Related Models

• Seiko 5271-434
• Seiko 4480-795
• Seiko 4448-968
• Seiko 0721-163
• Seiko 7076-810
• Seiko 4579-263
• Seiko 5249-247
• Seiko 5610-302
• Seiko 5616-697
• Seiko 7040-648
• Seiko 5235-935
• Seiko 6667-477