Category:Caesium Mk. 1 atomic clock
Caesium Mk. 1, the world's first caesium atomic clock from 1955.
Media in category "Caesium Mk. 1 atomic clock"
The following 4 files are in this category, out of 4 total.
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Atomic Clock-Louis Essen.jpg 620 × 360; 73 KB
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Mk. 1 caesium clock ScienceMuseum (20845609130).jpg 4,272 × 2,848; 5.55 MB
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Mk. 1 caesium clock ScienceMuseum (21007479106).jpg 4,272 × 2,848; 5.35 MB
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Nplcaesium.gif 267 × 210; 58 KB
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