1865 - 20c on 15c sky blue "horseshoe" overprint 3
1865
1865 - 20c on 15c sky blue "horseshoe" overprint 3rd type, block of six, on piece canceled with Sardo-Italian double circle "PORDENONE 16 FEB 67". Largest multiple known of this stamp. Cert. E.Diena (Sassone 25 - € 10.700)
