Seiko Cal. 6661 - 451

The Seiko 6661-451 represents an important milestone in Seiko's 1972 lineup. With its 20mm lug width and 14.4mm profile, it sits comfortably on most wrists. [seikata-wm-191edbe50af3]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1972

Related Models

• Seiko 5630-312
• Seiko 4571-838
• Seiko 4431-926
• Seiko 3895-135
• Seiko 6173-770
• Seiko 6221-928
• Seiko 6687-685
• Seiko 4528-100
• Seiko 7059-541
• Seiko 6396-159
• Seiko 5269-350
• Seiko 7191-597