Seiko Cal. 6635 - 994

This Spring Drive model from 1988 features a 45mm Titanium case. With its 21mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-2f3cabcf4db8]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1988

Related Models

• Seiko 6316-809
• Seiko 7171-268
• Seiko 0734-956
• Seiko 4590-578
• Seiko 4520-800
• Seiko 6262-819
• Seiko 3838-331
• Seiko 6147-885
• Seiko 7091-470
• Seiko 6393-458
• Seiko 4536-890
• Seiko 6186-497