Category:Time signal devices

Media in category "Time signal devices"

The following 8 files are in this category, out of 8 total.

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  Howard 89 Regulator dial.jpg 5,184 × 3,456; 7.02 MB
  
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  Ladd Observatory clock vault.tif 4,628 × 2,715; 12.01 MB
  
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  Ladd Observatory telegraph.tif 4,708 × 2,820; 12.69 MB
  
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  Riefler Fig.2.png 429 × 267; 20 KB
  
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  Riefler Fig.5.png 320 × 246; 22 KB
  
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  Riefler Fig.7.png 232 × 282; 17 KB
  
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  Time signal device for radio broadcasting, 1963 2.jpg 4,391 × 4,395; 2.03 MB
  
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  Time signal device for radio broadcasting, 1963.jpg 4,282 × 4,405; 1.67 MB