Hi. I am new to the Forum and had a 1964 F30 but have just bought a 1970's F50. It was described as that but I am wondering if it is an F50R since it has a flat back with inly down the centre. It has a beautiful rich tone but a faded serial number so I am trying to find out more about the model and model and history. If anyone can help big time, I could give an email address and could send some photos... Robin