Helicopter Bell D-250 / YHO-4 Serial 7 Register 62-4205 used by US Army Aviation Army. Built 1963. Aircraft history and location Aircraft History 62-4205 US Army Aviation Bell 206/YHO-4 cn7, ff:1963 del US Army as YHO-4 62-4205, 1963 redesig YOH-4, 1963 presumed scr. Send Updates Use APP to upload photo @ (optional) When Now? / / Send