Seiko Cal. 6631 - 773

The Seiko 6631-773 represents an important milestone in Seiko's 1989 lineup. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-2023d8d9082f]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1989

Related Models

• Seiko 5277-163
• Seiko 6254-128
• Seiko 7081-672
• Seiko 0751-839
• Seiko 7058-403
• Seiko 5230-655
• Seiko 6120-770
• Seiko 4481-541
• Seiko 6146-463
• Seiko 0711-559
• Seiko 5647-541
• Seiko 5614-581