I bought this boat few weeks ago, and it is registered in Finland as Coronet 21 Sea-Cat...
It looks like Cabin Cruiser or Explorer, with mild diffrences like smaller cabin windows (the place is the same looking, but fitted with smaller frames)... the boat is with toilet, heater, icebox and gas-hob/wash-basin. Engine is VP AQ171 with 290 drive. I will get the picture soon to Web. It has been an exhibition sampel back in 1972 and also in offshore competition in the same year. So any remarks of this "Sea-Cat" version?