Keep-up the track on Challenger 300

The Challenger 300 series contain 3 different variants. The oldest Challenger 300 was developed in early 2000. There are still very old ones with straight avionics safely flying around the globe. Challenger 350 is the later development and facelift. There are major design changes easily recognized on the first sight. While the differences from 300 to 350 were visible, the changes between 350 and Challenger 3500 are visually more subtle. The differences of most recent Challenger 3500 are hidden from outside in the cabin and the cockpit.