Seiko Cal. 6638 - 915

The Seiko 6638-915 represents an important milestone in Seiko's 1981 lineup. With its 20mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-4396ec3872d7]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

15.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Cream

Jewels

27j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1981

Related Models

• Seiko 6620-742
• Seiko 6186-800
• Seiko 4469-623
• Seiko 5266-865
• Seiko 0745-378
• Seiko 5275-521
• Seiko 4490-979
• Seiko 7013-399
• Seiko 6654-340
• Seiko 6261-854
• Seiko 4458-339
• Seiko 0785-493