Telechron was once a highly popular clock manufacturer. This advertisement came during the brand’s long downturn and full absorption into General Electric as battery and quartz technology supplanted the once-groundbreaking electric synchronous motor. Almost every model was a true beauty of then-modern design. They are now highly sought after by collectors. In addition to the interesting Wikipedia article linked above, more information with tons of photos can be found at telechron.net.
Also notice that this ad comes with 2015’s first mention of the C-word here on KoHoSo.us. I can’t hold back much longer.