I have 24 of these clocks available, they were recently removed from a school undergoing demolition. You will receive a clock like the one in the photo (and in the same condition) but not the exact same clock.  Each clock is 13 inches in diameter, has a glass front and steel ring. These clocks are called "flush mount" as in the protruding clock motor at the back of the clock is meant to go into the recessed electrical box in a wall, as these are originally directly wired into the the building's electrical system so they can be wired to and governed by a master clock. The resulting setup still has the clock protruding from the wall by an inch or so, so they call it "flush". 

If you aren't planning on hard wiring the clock into a wall it can be easily wired to a normal plug wire (think like if you were making a lamp using a kit). I will provide detailed instructions with each clock on how to wire it so it can be plugged into a wall outlet. You will need to supply the wire and connectors. If you do go that route then you will probably want to buy one of the clocks that comes with a different style mounting ring that is 4" deep, so there's room for the motor behind the clock as it's hung on the wall. Please see my other listings for those clocks.

I also have available (in a separate listing) clocks that are mounted to a bracket that allows 2 clocks to be hung back to back from the wall or ceiling. Prices vary for all different iterations of clock.

Please fell free to message me if you have any questions, the listings for the other styles of clock will be up in the next 24 hours. Thanks