Seiko Cal. 6631 - 761

This Hand-Winding model from 1989 features a 46mm Hardlex-Coated Steel case. Powered by the 6631 caliber with 31j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-9809ba278386]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

31j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1989

Related Models

• Seiko 6399-778
• Seiko 5627-618
• Seiko 6320-814
• Seiko 4568-453
• Seiko 7081-913
• Seiko 4525-361
• Seiko 6677-245
• Seiko 5215-376
• Seiko 4448-415
• Seiko 5227-863
• Seiko 7137-246
• Seiko 7113-536