Seiko Cal. 6639 - 828

The Seiko 6639-828 represents an important milestone in Seiko's 1991 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-ac5be960c7db]

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

9.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1991

Related Models

• Seiko 6120-671
• Seiko 6385-468
• Seiko 3821-390
• Seiko 7198-457
• Seiko 7079-320
• Seiko 6156-198
• Seiko 7184-712
• Seiko 6193-199
• Seiko 6610-715
• Seiko 5681-163
• Seiko 7072-787
• Seiko 6177-293