Seth Thomas World War 2 US Army Air Corps sector clock, operations room clock

Update #1: Someone reached out and suggested that the second hand is also clipped and shorter than original. I don’t know enough to say for sure, but I’m happy to report this as another potential issue in addition to the condition issues below. Condition notes: decent shape, but parts only. The sun-numbers in red are often much more faded. The colors are good. The second hand isn’t firmly attached to center dial. The screw down doesn’t appear original – it’s brown instead of a matching black. One screw (of 3) missing from metal ring holding dial in case. Seth Thomas World War 2 us army air Corps operations room sector clock, color coded dial was used for tracking enemy air craft on bombing missions, field locations would transmit back info when aircraft would fly over head, the operations room would map the progress of the aircraft with these clocks and color zones. It measures 10 1/4 dia. At front bezel, dial is 8 1/2 dia.