Geeky in a very different way: I get a kick out the true atomic watches ala Bathys https://www.hodinkee.com/articles/introducing-the-bathys-cesium-133-atomic-c

Geeky in a very different way: I get a kick out the true atomic watches ala Bathys https://www.hodinkee.com/articles/introducing-the-bathys-cesium-133-atomic-clock-watch https://www.hodinkee.com/articles/introducing-the-bathys-ces..., though Hoptroff begs to differ... https://www.hoptroff.com/collections/atomic-timepieces/products/no-10 https://www.hoptroff.com/collections/atomic-timepieces/produ... Not radio controlled, but actual atomic-based frequency drivers. I know, not really what you mentioned, but cool nonetheless.