This sale is for a Mars Skybolt 3-sealed beam rotating beacon. These were the same beacons mounted on Chicago PD/FD cross bars. This light rotates flawlessly and is almost silent. It shows signs of use but otherwise working perfectly. The mechanics base is a tad rusty but it does not affect the condition. Matching bulbs. Dome is in great shape with only some minor blemishes that would likely buff out. Please ask if you have any questions!!