Seiko Cal. 5643 - 663

The Seiko 5643-663 represents an important milestone in Seiko's 1968 lineup. Powered by the 5643 caliber with 32j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-f90dc883a117]

Also known as: UFO, Sportsmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

32j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1968

Related Models

• Seiko 6668-657
• Seiko 3837-699
• Seiko 6159-633
• Seiko 4575-848
• Seiko 6136-791
• Seiko 0757-888
• Seiko 3855-911
• Seiko 6687-503
• Seiko 3861-605
• Seiko 6673-413
• Seiko 7115-853
• Seiko 3858-857