Seiko Cal. 5638 - 791

This Spring Drive model from 1991 features a 38mm Stainless Steel case. Powered by the 5638 caliber with 30j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-2e7d8131faa2]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

8.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Burgundy

Jewels

30j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1991

Related Models

• Seiko 0760-676
• Seiko 6637-427
• Seiko 7093-867
• Seiko 4593-103
• Seiko 0718-820
• Seiko 6683-489
• Seiko 5222-102
• Seiko 4413-981
• Seiko 5293-938
• Seiko 4561-556
• Seiko 0740-375
• Seiko 6148-746