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


Size: 1176px × 1701px
Photo credit: © Auk Archive / Alamy / Afripics
License: Licensed
Model Released: No

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