Seiko Cal. 6690 - 792

This Spring Drive model from 1977 features a 36mm Stainless Steel case. Powered by the 6690 caliber with 28j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-91e4c523fbb4]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1977

Related Models

• Seiko 6335-383
• Seiko 6663-708
• Seiko 6126-113
• Seiko 6371-927
• Seiko 6133-599
• Seiko 4429-247
• Seiko 7154-672
• Seiko 6640-109
• Seiko 5663-672
• Seiko 4543-717
• Seiko 7044-996
• Seiko 7023-732