Seiko Cal. 6643 - 646

The 6643-646 is a sought-after Kinetic piece from Seiko's golden era. With its 20mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-caca4fb63945]

Also known as: World Timer, Sea Horse

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

41mm

Case Thickness

11.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1989

Related Models

• Seiko 5666-975
• Seiko 5213-388
• Seiko 4437-735
• Seiko 7192-798
• Seiko 5270-279
• Seiko 6130-795
• Seiko 6259-110
• Seiko 0764-468
• Seiko 5659-842
• Seiko 4425-409
• Seiko 6343-582
• Seiko 4445-460