Seiko Cal. 5690 - 631

This Quartz model from 1968 features a 41mm Stainless Steel case. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-2b6f55ebd702]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Champagne

Jewels

34j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1968

Related Models

• Seiko 6331-891
• Seiko 7025-118
• Seiko 5214-896
• Seiko 6249-939
• Seiko 6259-238
• Seiko 4547-522
• Seiko 5286-131
• Seiko 0725-362
• Seiko 7155-264
• Seiko 7134-298
• Seiko 6156-617
• Seiko 4544-322