Seiko Cal. 6657 - 727

This Kinetic model from 1967 features a 44mm Hardlex-Coated Steel case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-22bf30aeee1d]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1967

Related Models

• Seiko 6329-608
• Seiko 7056-940
• Seiko 6139-395
• Seiko 5252-470
• Seiko 6385-684
• Seiko 4498-241
• Seiko 4446-193
• Seiko 7076-429
• Seiko 6178-747
• Seiko 6385-566
• Seiko 5246-356
• Seiko 7034-791