Seiko Cal. 6657 - 731

The Seiko 6657-731 represents an important milestone in Seiko's 1983 lineup. The Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-8f9f9d0a1f21]

Also known as: Crown, Emperor

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Black

Jewels

28j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1983

Related Models

• Seiko 4432-821
• Seiko 6274-236
• Seiko 6319-628
• Seiko 7064-524
• Seiko 6396-351
• Seiko 6156-159
• Seiko 7031-534
• Seiko 5230-345
• Seiko 6362-700
• Seiko 3812-412
• Seiko 6261-515
• Seiko 4538-847