Seiko Cal. 6631 - 772

The Seiko 6631-772 represents an important milestone in Seiko's 1973 lineup. Powered by the 6631 caliber with 23j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-48c2b0682218]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

White

Jewels

23j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1973

Related Models

• Seiko 7178-193
• Seiko 3820-736
• Seiko 6622-712
• Seiko 6324-653
• Seiko 6367-619
• Seiko 5682-492
• Seiko 5629-399
• Seiko 6135-127
• Seiko 5218-599
• Seiko 5297-956
• Seiko 4432-734
• Seiko 6394-193