Italian Ancient States - Sardinia - Sardinia 4-letter cancellations: Lanusei, Sanluri, Paulilatino, Oristano - Interesting lot

Interesting lot of postal history including a title page and three letters with double-circle postmarks from the island of Sardinia of: Lanusei, Paulilatino, Sanluri and Oristano.
Noted Sanluri on ink of 55 with postmark 56 and Oristano with mixed Italy/Sardinia addressed to Rome toward the Papal States and taxed on arrival.
A set of certainly interest to the specialist, always uncommon and hard to obtain are the Sardinian postmarks.
High catalog value (over €4800 between postmarks and stamps).

I ship exclusively by insured shipping within Italy and via express courier for abroad.
Maximum seriousness