Seiko Cal. 6635 - 766

The Seiko 6635-766 represents an important milestone in Seiko's 1988 lineup. With its 18mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-2befe8ca56fd]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1988

Related Models

• Seiko 0715-714
• Seiko 7170-455
• Seiko 6140-148
• Seiko 3865-103
• Seiko 6260-175
• Seiko 7158-543
• Seiko 3814-983
• Seiko 6111-771
• Seiko 5691-346
• Seiko 6145-225
• Seiko 5280-627
• Seiko 7117-720