I have a Sharp analog "atomic" clock that has always kept perfect accurate time. It's 14" in diameter and I bought it at Sam's about 5 years ago for $17, if I remember correctly. Before submitting this, I tuned in WWV. It was weak and scratchy but I heard it well enough to determine the clock is still performing the way it should.
Incidentally, I'm 76. I worked in commercial radio (back when the DJs were real) and TV. I remember when the TV networks broadcast a tone at the top of the hour. That must have been 50 years ago. Anyway, I was a DJ off and on. We actually used vinyl records and and the network had news at the top of the hour. Most independent stations used the Mutual Broadcasting System. It was then that became almost fanatical about accurate timepieces because I used that 5-minute newscast for a lot of things. I might check the meters on the transmitter, go to the bathroom, fix a cup of coffee or whatever. In any event, I had to get back in the control room in 5 minutes or it was dead air. In 1965, my ex-wife (bless her heart) even bought me a Bulova Accutron Spaceview watch for my birthday. I still have it.
If I'm playing around with my Tecsun radio, I invariably tune in to 5, 10 or 15 MHz, not to check the time but just to hear that double-tick at the top of the hour and sorta assure myself they're still around.