I have what I believe to be a Fiorelli/Coppi 1976 Tour de France Special model. It has similar chromed (and rusty) lugs to yours, and is of 531 tubing, though mine does not have the "C" BB cutout. Other than a couple components (shifters, headset, stem) they look identical. Mine is pearlish orange. Are you sure yours is a repaint? If it fits you, you will really like the ride.
Here's
mine: