Seiko Cal. 5643 - 677

The Seiko 5643-677 represents an important milestone in Seiko's 1973 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-eb26d183bafa]

Also known as: Samurai, Sportsmatic

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1973

Related Models

• Seiko 7166-278
• Seiko 3836-995
• Seiko 4472-617
• Seiko 4559-197
• Seiko 5647-611
• Seiko 6272-785
• Seiko 4448-592
• Seiko 5258-216
• Seiko 5256-315
• Seiko 3825-147
• Seiko 7145-919
• Seiko 5259-983