There are several patent dates on the bottom, the most recent one is January 25, 2917. Please check out my. This art deco Telechron Clock is known as the Tempo, has a bakelite housing with a metal face, an H3 rotor and was designed by Jacques Bars. The item “Art Deco Telechron Electric Clock, Warren Telechron, Model 3F61 Works” is in sale since Tuesday, August 02, 2016. This item is in the category “Toys &…