Seiko Cal. 6658 - 657

The Seiko 6658-657 represents an important milestone in Seiko's 1965 lineup. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-82f70d7b1587]

Also known as: Bellmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1965

Related Models

• Seiko 6155-607
• Seiko 4458-122
• Seiko 3887-536
• Seiko 6310-431
• Seiko 6168-834
• Seiko 4524-377
• Seiko 3824-630
• Seiko 4549-593
• Seiko 6226-125
• Seiko 6665-112
• Seiko 0721-771
• Seiko 7196-721