Seiko Cal. 6636 - 868

The Seiko 6636-868 represents an important milestone in Seiko's 1980 lineup. Powered by the 6636 caliber with 20j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-74f253f902f9]

Also known as: UFO, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Silver

Jewels

20j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1980

Related Models

• Seiko 7090-632
• Seiko 5286-302
• Seiko 6343-125
• Seiko 3874-966
• Seiko 0734-925
• Seiko 7194-122
• Seiko 7171-966
• Seiko 4555-835
• Seiko 6329-968
• Seiko 4560-997
• Seiko 7180-582
• Seiko 5283-757