Seiko Cal. 5690 - 531

The Seiko 5690-531 represents an important milestone in Seiko's 1985 lineup. With its 20mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-dfd64ad1c376]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1985

Related Models

• Seiko 5279-869
• Seiko 6149-572
• Seiko 0769-386
• Seiko 6125-108
• Seiko 7046-667
• Seiko 6610-955
• Seiko 6259-284
• Seiko 0726-273
• Seiko 3883-614
• Seiko 6297-735
• Seiko 0781-287
• Seiko 6640-126