1B115  Round Metal Case
Also, the 1F108, 1F110, 1F112, 1B118 & 1B124.  Same clock--different sizes.

"Modern business, with its 20th century speed and action, demands accuracy and dependability of time.  It is natural, therefore, that Telechron Commercial Electric Clocks are selected for businesses and professional offices, banks, drug and grocery stores, barber shops, candy and gift shops, etc.  Today everyone needs correct time more than ever before.  Every place of business needs an accurate and dependable clock not only for the guidance of its own people, but equally as important, for the hundreds of people (customers) who see the clock and come to depend on it."