Seiko Cal. 6635 - 630

The Seiko 6635-630 represents an important milestone in Seiko's 1991 lineup. With its 20mm lug width and 14.3mm profile, it sits comfortably on most wrists. [seikata-wm-5e31f231b06a]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

14.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Cream

Jewels

25j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1991

Related Models

• Seiko 3829-961
• Seiko 0713-818
• Seiko 4566-179
• Seiko 7198-730
• Seiko 6180-320
• Seiko 4525-506
• Seiko 3886-909
• Seiko 6337-954
• Seiko 6176-719
• Seiko 6399-673
• Seiko 5230-173
• Seiko 7132-768