Atomuhr CS4 caesium clock, Physikalisch-Technische Bundesanstalt, Braunschweig, 1992 - Braunschweigisches Landesmuseum -

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Size: 1147px × 1743px
Photo credit: © Auk Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: archival, archive, collection, historic, historical, history, reference, reportage