Seiko Cal. 6643 - 834

The Seiko 6643-834 represents an important milestone in Seiko's 1971 lineup. With its 20mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-80e54ff758c3]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1971

Related Models

• Seiko 7024-886
• Seiko 5257-225
• Seiko 4491-607
• Seiko 5651-308
• Seiko 6123-785
• Seiko 6229-520
• Seiko 5639-506
• Seiko 4582-809
• Seiko 4490-287
• Seiko 4548-934
• Seiko 4525-444
• Seiko 6628-352