So this is screengrab from the excellent 1969 film, the Battle Of Britain
Notice anything?
Well it was no secret that the film makers did not use original German Heinkel III bombers, but post war Spanish built versions which were at that time still part of the Spanish Airforce.
They used Rolls Royce engines which gave the game away, but look closely at the wings and you can see the Spanish roundles underneath the Luftwaffe paintwork.
Minor quibble on a great film.