Seiko Cal. 6634 - 931

The Seiko 6634-931 represents an important milestone in Seiko's 1997 lineup. Powered by the 6634 caliber with 31j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-78e62f95e642]

Also known as: Monster, Bellmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

36mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1997

Related Models

• Seiko 7059-629
• Seiko 5685-750
• Seiko 0771-574
• Seiko 6122-415
• Seiko 5689-140
• Seiko 6298-415
• Seiko 5641-986
• Seiko 6348-523
• Seiko 0762-527
• Seiko 7019-611
• Seiko 6111-693
• Seiko 6191-344