Seiko Cal. 5660 - 331

The Seiko 5660-331 represents an important milestone in Seiko's 1988 lineup. The Fixed bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-5edc259c27a3]

Also known as: Silverwave, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

70m

Dial Color

Black

Jewels

26j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1988

Related Models

• Seiko 7161-155
• Seiko 4590-641
• Seiko 3820-572
• Seiko 0782-111
• Seiko 7112-145
• Seiko 5270-319
• Seiko 5681-229
• Seiko 4560-699
• Seiko 6612-743
• Seiko 4585-438
• Seiko 4587-325
• Seiko 6232-913