Seiko Cal. 6635 - 590

The Seiko 6635-590 represents an important milestone in Seiko's 1989 lineup. With its 20mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-b04480139b22]

Also known as: Sumo, Bullhead

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1989

Related Models

• Seiko 3871-841
• Seiko 6645-531
• Seiko 5283-232
• Seiko 4423-966
• Seiko 0790-379
• Seiko 6139-443
• Seiko 6144-586
• Seiko 3884-689
• Seiko 6152-809
• Seiko 5640-463
• Seiko 4598-576
• Seiko 3882-980