Seiko Cal. 6643 - 865

The Seiko 6643-865 represents an important milestone in Seiko's 1976 lineup. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-8c70b986ef06]

Also known as: Panda

Specifications

Movement

Solar

Case Material

Titanium

Case Width

43mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1976

Related Models

• Seiko 0752-491
• Seiko 6144-339
• Seiko 0775-688
• Seiko 4571-711
• Seiko 6636-813
• Seiko 0782-136
• Seiko 7158-833
• Seiko 7197-413
• Seiko 5612-259
• Seiko 7147-621
• Seiko 4483-830
• Seiko 4453-830