Seiko Cal. 5638 - 588

The 5638-588 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5638 caliber with 31j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-17a43ad5f915]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1988

Related Models

• Seiko 6289-310
• Seiko 6190-636
• Seiko 7125-194
• Seiko 7039-795
• Seiko 6146-832
• Seiko 6385-998
• Seiko 7097-796
• Seiko 4412-337
• Seiko 4496-764
• Seiko 6341-827
• Seiko 5248-392
• Seiko 4568-878