This impressive dark coloured two-tone gran turismo bus was built by SICCA on top of the Alfa Romeo 800A chassis and running gear. This specific bus participated in a concours and won the first prize for best design.
Another light coloured two-tone bus on the 800A chassis mechanicals was made by SICCA with the same design, but the only difference that the roof windows became tinted to avoid sun issues for the passengers (perhaps as a lessons learned of the first example?).
You did a very good job removing the DOLOMITI name from the nose, and the bus company from the door without being obvious.