Stamp Issuers: Letter O
17 issuers found
Oakway
Obock
Occupied Berlin (Allied Control Council)
Oil Rivers Protectorate
Old German States
Oldenburg
Oltre Giuba (Italian Somaliland South of Juba)
Oman
Opd Dresden (German Local Post)
OPD Erfurt (Oberpostdirektion Erfurt)
OPD Halle (Oberpostdirektion Halle)
Opd Leipzig (Soviet Occupation)
OPD Schwerin (Mecklenburg-Vorpommern)
Orange Free State
Orange River Colony
Orchha (Princely State)
Outer Seychelles
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