Seiko Cal. 6690 - 710

This Quartz model from 1981 features a 42mm Titanium case. Powered by the 6690 caliber with 18j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-7885c71489e8]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

42mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1981

Related Models

• Seiko 4464-596
• Seiko 0726-889
• Seiko 6373-681
• Seiko 5232-179
• Seiko 4473-678
• Seiko 6138-148
• Seiko 4567-211
• Seiko 6332-638
• Seiko 7031-387
• Seiko 4549-305
• Seiko 7046-559
• Seiko 3848-931