103 selected
- Icaria
- Iceland
- Iceland - Jul stamps
- Ifni
- India
- India - Alwar
- India - Bhopal
- India - Bijawar
- India - Bundi
- India - Bussahir
- India - Chamba
- India - Charkhari
- India - Cochin
- India - Faridkot
- India - French post offices
- India - Gwalior
- India - Hyderabad
- India – Indore
- India - Jaipur
- India - Jammu and Kashmir
- India - Jasdan
- India - Jhalawar
- India - Jind
- India - Kishangarh
- India - Morvi
- India - Nabha
- India - Nagaland - Cinderella
- India - Nandgaon
- India - Nawanagar
- India - Orchha
- India - Patiala
- India - Poonch
- India - Rajpipla
- India - Sirmoor
- India - Soruth
- India - Travancore
- India - Travancore-Cochin
- India - Wadhwan
- Indochina
- Indochina - Canton Post Office
- Indochina - Chungking Post Office
- Indochina - Hoihow Post Office
- Indochina - Mengtsz Post Office
- Indochina - Pakhoi Post Office
- Indochina – Yunnanfu Post Office
- Indonesia
- Indonesia - Irian Barat
- Indonesia - Riau
- Indonesia - Vienna printings - Cinderella
- Inhambane
- Inini
- Ionian islands
- Iran (Persia)
- Iraq
- Ireland
- Ireland - Thomond - Cinderella
- Israel
- Italian Aegean Islands - Calchi
- Italian Aegean Islands - Calimno
- Italian Aegean Islands - Caso
- Italian Aegean Islands - Castelrosso
- Italian Aegean Islands - Coo
- Italian Aegean Islands - Lero
- Italian Aegean Islands - Lipso
- Italian Aegean Islands - Nisiro
- Italian Aegean Islands - Patmos
- Italian Aegean Islands - Piscopi
- Italian Aegean Islands - Rodi
- Italian Aegean Islands - Scarpanto
- Italian Aegean Islands - Simi
- Italian Aegean Islands - Stampalia
- Italian Aegean Islands [general issues]
- Italian Cyrenaica
- Italian East Africa
- Italian Eritrea
- Italian Ethiopia
- Italian Jubaland
- Italian Libya
- Italian post offices [general issues]
- Italian Somalia
- Italian states - Modena
- Italian states - Naples
- Italian states - Parma
- Italian states - Romagna
- Italian states - Sardinia
- Italian states - Sicily
- Italian states - Tuscany
- Italian Tripolitania
- Italy
- Italy - Campione
- Italy - Colonies [general issues]
- Italy - Dalmatia, Trento and Trieste
- Italy - Julian Venetia
- Italy - Papal State
- Italy - Trentino
- Italy [1910] - Occupation of Tripoli
- Italy [1940-1943] - Occupation of Ionian Islands
- Italy [1941-1942] - Occupation of Fiume-Kupa
- Italy [1941-1943] - Occupation of Montenegro
- Italy [1941] - Occupation of Slovenia
- Italy [1944-1945] - Italian Social Republic
- Ivory Coast
- Ivory Coast - Illegal Stamps
- Not filled in