Seiko Cal. 6657 - 990

This Kinetic model from 1967 features a 44mm Titanium case. Powered by the 6657 caliber with 26j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-85dd65415cee]

Also known as: UFO

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

44mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1967

Related Models

• Seiko 6287-644
• Seiko 6342-408
• Seiko 0756-823
• Seiko 6269-194
• Seiko 4464-524
• Seiko 4427-640
• Seiko 7047-689
• Seiko 5225-673
• Seiko 7022-562
• Seiko 6323-977
• Seiko 5663-546
• Seiko 6176-694