This is a very rare model. It is the blue 303 with a white interior and the small grey steering wheel with suspension fitted to make it the S version. It also has flat wheels which are free spinning.
These are most unusual and would have been replaced after a brief period, probably of a few months, by the silver-plated edition (and, later another blue one with a yellow interior).
This example has some corrosion which has affected the top side paintwork but, with an intact original screen and clean white interior it shows few signs of play wear.
The suspension is firm as always on these models. the whels are good and tyres look original.