Seiko Cal. 5638 - 561

The Seiko 5638-561 represents an important milestone in Seiko's 1985 lineup. With its 18mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-36000de32067]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

17j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1985

Related Models

• Seiko 4563-634
• Seiko 0724-294
• Seiko 6192-580
• Seiko 5241-609
• Seiko 3863-524
• Seiko 4565-116
• Seiko 0791-616
• Seiko 4499-194
• Seiko 3837-568
• Seiko 7156-173
• Seiko 3845-827
• Seiko 5613-341