40 CENTESIMI

Two were the printing runs of this postage stamp; the main differentiating element is the brown red color of the first printing run and vermilion for the second one (Fig. 1).
Unfortunately I don't have at this time a sample of the first printing run (quite rare) and therefore I'll show only one sample of the second one.

Fig. 1: 40 centesimi, 2nd printing

Catalogued color shades (as per Sassone) - 1st printing

Red brown (typical color)

Catalogued color shades (as per Sassone) - 2nd printing

Vermilion (typical color)
Bright vermilion