Seiko Cal. 6690 - 521

This Quartz model from 1965 features a 40mm Gold-Plated case. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-e5d66d91dce0]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

23j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1965

Related Models

• Seiko 4541-730
• Seiko 7143-997
• Seiko 5631-255
• Seiko 3851-550
• Seiko 6289-972
• Seiko 6124-655
• Seiko 5291-781
• Seiko 5668-788
• Seiko 6323-770
• Seiko 4491-166
• Seiko 0797-306
• Seiko 3871-686