Seiko Cal. 6643 - 704

The Seiko 6643-704 represents an important milestone in Seiko's 1983 lineup. The Inner Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-671c5c56cb70]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

White

Jewels

26j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1983

Related Models

• Seiko 0793-841
• Seiko 6318-939
• Seiko 6180-979
• Seiko 6397-295
• Seiko 5613-663
• Seiko 4524-906
• Seiko 4589-720
• Seiko 7093-523
• Seiko 4431-915
• Seiko 4585-622
• Seiko 0779-806
• Seiko 4542-662