Seiko Cal. 6691 - 677

The Seiko 6691-677 represents an important milestone in Seiko's 1967 lineup. It features a White dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-ac23e423baab]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

White

Jewels

24j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1967

Related Models

• Seiko 7156-869
• Seiko 5283-602
• Seiko 6360-247
• Seiko 7180-610
• Seiko 6664-962
• Seiko 4437-346
• Seiko 7096-928
• Seiko 7078-883
• Seiko 3816-647
• Seiko 6120-726
• Seiko 5263-658
• Seiko 6238-984