Three photographs illustrating condition of watches after removal from magnetic field
- Made:
- 1940 in United States
Three photographs, each 10" x 8", illustrating condition of balances and balance-springs of watches after removal from a magnetic field
Details
- Category:
- Time Measurement
- Object Number:
- 1940-30
- type:
- photograph
- credit:
- U.S. Bureau of Standards
