Seiko Cal. 6690 - 654

The Seiko 6690-654 represents an important milestone in Seiko's 1982 lineup. Powered by the 6690 caliber with 23j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-700361378f89]

Also known as: Sumo, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

15.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1982

Related Models

• Seiko 3816-253
• Seiko 6134-923
• Seiko 4557-335
• Seiko 4526-790
• Seiko 6647-306
• Seiko 0758-861
• Seiko 7127-693
• Seiko 7031-813
• Seiko 5667-827
• Seiko 5623-378
• Seiko 6381-953
• Seiko 6133-958