Maybe that’s even more than half of the fun. [CuriousMarc] got an HP 5061A Cesium clock, a somewhat famous instrument as the model that attempted to prove the theory of relativity. The reason?
Remixes by: Access Smithsonian, Amazon Web Services-Sumerian, Amy Karle, An Open Book Foundation, AstroNuts, Autodesk Tinkercad, Cesium, Chris Funk & N M Bodecker Foundation, Creative Commons, Duke ...