Seiko Cal. 6638 - 328

The Seiko 6638-328 represents an important milestone in Seiko's 1988 lineup. With its 21mm lug width and 12.4mm profile, it sits comfortably on most wrists. [seikata-wm-bd1b2d5651b9]

Also known as: Goldfeather, Sea Horse

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1988

Related Models

• Seiko 6125-250
• Seiko 6345-216
• Seiko 5228-929
• Seiko 6131-440
• Seiko 6193-731
• Seiko 5688-758
• Seiko 6138-794
• Seiko 6684-287
• Seiko 5219-381
• Seiko 3857-234
• Seiko 5638-807
• Seiko 6667-761