Seiko Cal. 6688 - 491

The Seiko 6688-491 represents an important milestone in Seiko's 1969 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-225a576e003a]

Also known as: Helmet, World Timer

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Champagne

Jewels

32j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1969

Related Models

• Seiko 4537-843
• Seiko 0736-541
• Seiko 7055-994
• Seiko 7123-396
• Seiko 6196-450
• Seiko 6254-730
• Seiko 0750-727
• Seiko 6340-543
• Seiko 6334-398
• Seiko 6374-549
• Seiko 6264-211
• Seiko 4574-466