I spot a difference with European Opel Rekords: there are tiny round lights on both side sof the grille, next to the indicators. Parking lights I presume. Opel USA publicity photos always show this colour, perhaps the only car they had for these purposes?
The bow shock-wave - very high subsonic flight, just below the speed of sound. Some surfaces of the aircraft are already supersonic - there is local supersonic flow. The mass condensation occurs in the low pressure area directly behind the bow shock-wave.