I'm quite sure the picture shows a modern MM rerun, and not a fifties edition. In those years the numbers were written onto the body with white picture, and corresponded to the start hour. In the photo we clearly see plastic adesive numbers, so I don't understand why you say that it is not in modern time.
I remember this car in Italy some years ago; it carried an Italian plate AV-1___ , later I saw it with a German plate, hoping this may help Nicanary.