Seiko Cal. 5638 - 157

The Seiko 5638-157 represents an important milestone in Seiko's 1991 lineup. Powered by the 5638 caliber with 27j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-2675cddeeac3]

Also known as: Bullhead, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Burgundy

Jewels

27j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1991

Related Models

• Seiko 7028-516
• Seiko 0795-870
• Seiko 7180-259
• Seiko 7038-383
• Seiko 6334-544
• Seiko 0787-947
• Seiko 6657-625
• Seiko 5685-963
• Seiko 3880-358
• Seiko 6615-175
• Seiko 6237-444
• Seiko 6675-870