25c with red overprint rather than the common black overprint of a different design.
It is possible that this was a Proof printing made in larger than usual quantities, with the bulk issued at Post Offices
Sassone 490
50 lire, Verona printing
Sassone 501
SOCIAIE instead of SOCIALE error
Sassone 504aa
White Line in P on the Express stamp
Sassone E23c
