The first "digital" electric clock ever with the patents to prove it.  Telechron called these clocks "cyclometers".  That's a funny name.  This model had a little lamp for EZ viewing after dark but no way to shut it off.  Ooops!  ALL lamps in G.E. and Telechrons were Mazda type 41s.  You can look a long time for these things and not find any.  Click HERE to go to the only place I know to get some.  Notice the weird orientation of the B rotor in back.