Seiko Cal. 6643 - 803

The Seiko 6643-803 represents an important milestone in Seiko's 1970 lineup. With its 22mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-1175916de926]

Also known as: UFO, Sportsmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

42mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Black

Jewels

19j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1970

Related Models

• Seiko 3843-135
• Seiko 7142-229
• Seiko 7118-526
• Seiko 6336-803
• Seiko 7021-893
• Seiko 4467-390
• Seiko 6296-258
• Seiko 5216-694
• Seiko 5236-434
• Seiko 4579-206
• Seiko 6327-311
• Seiko 0780-668