Seiko Cal. 6635 - 690

The Seiko 6635-690 represents an important milestone in Seiko's 1977 lineup. It features a White dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-fa49614cb2b7]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

36mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

White

Jewels

24j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1977

Related Models

• Seiko 6174-571
• Seiko 4445-161
• Seiko 7145-674
• Seiko 7046-156
• Seiko 7187-165
• Seiko 6264-560
• Seiko 6121-865
• Seiko 3811-765
• Seiko 4412-242
• Seiko 4494-997
• Seiko 5631-592
• Seiko 5627-926