Seiko Cal. 6636 - 821

The Seiko 6636-821 represents an important milestone in Seiko's 1966 lineup. With its 19mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-51beacb0869e]

Also known as: Samurai, UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

9.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1966

Related Models

• Seiko 6652-988
• Seiko 4514-215
• Seiko 0773-618
• Seiko 3857-544
• Seiko 5653-997
• Seiko 6378-234
• Seiko 6218-427
• Seiko 6637-395
• Seiko 4580-985
• Seiko 0758-978
• Seiko 0764-628
• Seiko 7055-769