Seiko Cal. 6636 - 299

This Spring Drive model from 1975 features a 41mm Titanium case. With its 22mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-5c0cb1fa948e]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Burgundy

Jewels

29j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1975

Related Models

• Seiko 7023-682
• Seiko 4584-994
• Seiko 3866-490
• Seiko 6290-155
• Seiko 6140-233
• Seiko 3828-326
• Seiko 5251-617
• Seiko 5639-779
• Seiko 4486-256
• Seiko 5270-321
• Seiko 3820-615
• Seiko 3899-451