Seiko Cal. 6631 - 310

The Seiko 6631-310 represents an important milestone in Seiko's 1992 lineup. With its 22mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-9ee190309d3b]

Also known as: Rally

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1992

Related Models

• Seiko 6611-660
• Seiko 7052-623
• Seiko 3883-893
• Seiko 5661-939
• Seiko 5249-543
• Seiko 3813-369
• Seiko 4498-250
• Seiko 7071-212
• Seiko 6312-958
• Seiko 3816-904
• Seiko 4541-625
• Seiko 6662-103