They are 73 or 88 notes, in suitcase or stage version, manufactured under the Rhodes brand (without Fender). They were made from 1979 to 1983. The main difference between a 1979 Mk I and a Mk II of the same year is the look. The hood of the MKII is flat and grooved. The front panel is also redesigned, the potentiometers are replaced by sliders.