Seiko Cal. 6643 - 748

The Seiko 6643-748 represents an important milestone in Seiko's 1976 lineup. It features a Green dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-8fd6f8618766]

Also known as: Monster, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1976

Related Models

• Seiko 7169-379
• Seiko 4560-856
• Seiko 5649-976
• Seiko 4522-406
• Seiko 5614-433
• Seiko 6191-407
• Seiko 0746-108
• Seiko 6257-633
• Seiko 6116-119
• Seiko 7097-186
• Seiko 4545-320
• Seiko 6680-827