The blazon is accurate

The crosses on the arms of Greece and Italy (Savoy) look similar; however, the former does not touch the edges of the shield and is therefore termed "couped".

Greece (couped)

Incoming censorship sealing cachet

Italy (Savoy)

Cover sent from Montepagano Municipality with transit postmark of Giulianova dated 12.9.1863, to the prefect of the Province of Teramo (arrival postmark dated a day later on back).