Seiko Cal. 6646 - 704

The Seiko 6646-704 represents an important milestone in Seiko's 1982 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-875b053d42c9]

Also known as: Monster, Sportsmatic

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

33j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1982

Related Models

• Seiko 3822-381
• Seiko 6360-818
• Seiko 4466-958
• Seiko 4593-937
• Seiko 6359-455
• Seiko 4552-755
• Seiko 6635-303
• Seiko 6179-882
• Seiko 3836-392
• Seiko 6236-440
• Seiko 4491-103
• Seiko 3829-636