Seiko Cal. 5691 - 820

The Seiko 5691-820 represents an important milestone in Seiko's 1967 lineup. Powered by the 5691 caliber with 31j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-3ce8cf55e19b]

Also known as: Panda, Bullhead

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

White

Jewels

31j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1967

Related Models

• Seiko 6669-944
• Seiko 5620-687
• Seiko 6245-341
• Seiko 6650-283
• Seiko 7013-672
• Seiko 6289-964
• Seiko 4515-262
• Seiko 6297-498
• Seiko 4583-884
• Seiko 7079-576
• Seiko 7146-409
• Seiko 5211-162