• Serial Numbers
  Elgin Hamilton Illinois South Bend Waltham Longines Vacheron & Constantin
• Illustrations
  Manual Wind Movement - Dial Side Manual Wind Movement - Bridge Side Chronograph Mechanism - Pillar Wheel Type Chronograph Mechanism - Non-Pillar Wheel Type
• Resources
  Resources for Identification Useful Information for Searches
• Watch Trademarks
  Watch Manufacturers Trade Marks
• More
  Do Your Own Your Watch? Swiss Brands with Restrictive Parts Policies Horology Matters Yahoo Group U.S. Government Time -NIST

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Serial Numbers:
Elgin
Hamilton
Illinois
South Bend
Waltham
Longines
Vacheron & Constantin

Illustrations:
Manual Wind Movement - Dial Side
Manual Wind Movement - Bridge Side
Chronograph Mechanism - Pillar Wheel Type
Chronograph Mechanism - Non-Pillar Wheel Type

Resources:
Resources for Identification

Watch Trademarks:
Watch Manufacturers Trade Marks

More:
Do Your Own Your Watch?
Swiss Brands with Restrictive Parts Policies
Horology Matters Yahoo Group