American Waltham Watch Company

History

The firm that industrialised watchmaking, developing machine-made interchangeable components and, over a century, producing tens of millions of movements across many models and grades.

Major innovations

• Machine production of interchangeable watch parts at scale
• Systematic model-and-grade production hierarchy

Known markings

• 'A.W.W.Co. Waltham, Mass.'
• Grade names on the barrel bridge

Serial numbers

Published serial tables give approximate production years; individual movements may have been cased and sold considerably later.

Collecting significance

Early Model 1857 movements and high-grade adjusted movements attract the most research attention.

Sources & references

1. Waltham factory records as published by the NAWCC
2. Moore, C., Timing a Century

Where sources disagree, the disagreement is stated rather than resolved silently.