Mercedes-Benz 190 SL

Thanks to my dear friend Artemis Mallas (@ammallas) for these photos. He found this Mercedes-Benz 190 SL in Key West, FL USA! According to license plate, this is an original one and it is under restoration. However, there is a minor problem! This car has the front head lights of 300SL but, there is a 190 SL model mark is attached at the back. During 1950s, 190 SL and 300 SL produced together but their front head lights were different. I am a bit confused with the car.