Seiko Cal. 5638 - 580

The Seiko 5638-580 represents an important milestone in Seiko's 1986 lineup. Powered by the 5638 caliber with 20j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-e698f08874ce]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1986

Related Models

• Seiko 7055-947
• Seiko 6641-551
• Seiko 6260-801
• Seiko 3810-123
• Seiko 6155-677
• Seiko 3839-638
• Seiko 6194-149
• Seiko 7039-557
• Seiko 6664-560
• Seiko 5691-320
• Seiko 6226-785
• Seiko 5291-352