Rolex 1680 - Accuracy

[Dan S]

Originally Posted by Robison347

Several of us knew the phone number of the National Bureau of Standards in Ft.Collins, Colorado by heart. That was the standard to set you watch to, if you were finicky. 303-499-7111. That number still works today, and I still call it.

Just to add slightly to this. The radio transmitter broadcasting the time is in fact near Fort Collins, but the only thing in Fort Collins is a broadcast station. The atomic clock itself is of course at the NBS (now NIST) lab in Boulder. We don't like to give Fort Collins any credit if we can avoid it. :-)