Seiko Cal. 6643 - 444

The 6643-444 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-296f05bf462c]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

27j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1977

Related Models

• Seiko 7069-192
• Seiko 3849-327
• Seiko 0770-798
• Seiko 4529-388
• Seiko 5638-355
• Seiko 7185-823
• Seiko 5264-508
• Seiko 6343-548
• Seiko 4538-950
• Seiko 6343-901
• Seiko 7011-674
• Seiko 5299-140