Seiko Cal. 6642 - 680

This Hand-Winding model from 1970 features a 38mm Gold-Plated case. With its 18mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-9302cccfb9a3]

Also known as: Monster, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

15.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Champagne

Jewels

31j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1970

Related Models

• Seiko 6348-840
• Seiko 6250-231
• Seiko 6158-858
• Seiko 4495-683
• Seiko 6170-343
• Seiko 6635-635
• Seiko 4450-346
• Seiko 5688-399
• Seiko 4498-277
• Seiko 4456-811
• Seiko 4561-274
• Seiko 5690-173