Seiko Cal. 6638 - 584

The Seiko 6638-584 represents an important milestone in Seiko's 1998 lineup. With its 22mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-aa16e5639860]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

15.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1998

Related Models

• Seiko 3857-549
• Seiko 0726-372
• Seiko 0740-627
• Seiko 4529-708
• Seiko 3827-595
• Seiko 4558-449
• Seiko 4471-661
• Seiko 6154-750
• Seiko 4553-525
• Seiko 3884-768
• Seiko 6192-237
• Seiko 6284-538