Seiko Cal. 6641 - 789

The Seiko 6641-789 represents an important milestone in Seiko's 1978 lineup. The Fixed bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-d5bb998ccc05]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1978

Related Models

• Seiko 4537-518
• Seiko 4422-769
• Seiko 6395-873
• Seiko 6690-647
• Seiko 4552-357
• Seiko 0790-930
• Seiko 7066-843
• Seiko 6624-116
• Seiko 3832-938
• Seiko 5663-803
• Seiko 4412-560
• Seiko 0747-793