Seiko Cal. 6689 - 637

The Seiko 6689-637 represents an important milestone in Seiko's 1989 lineup. Powered by the 6689 caliber with 33j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-292fb60ad548]

Also known as: Samurai, Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1989

Related Models

• Seiko 4577-747
• Seiko 6189-775
• Seiko 6632-974
• Seiko 4595-230
• Seiko 7080-376
• Seiko 7077-378
• Seiko 6394-355
• Seiko 5220-656
• Seiko 7078-236
• Seiko 4545-928
• Seiko 6677-288
• Seiko 0762-303