Overprints on this type: (See as list) 9/1/1927 15c issue=1924 pneumatic ovpt=Cent. 15//bars oc=blk Somalia postage 10/10/1927 20c issue=Volta ovpt=Somalia//Italiana oc=blk |
External links: Colnect 57557-..Pneumatic_Mail Record of changes |
Overprints on this type: (See as list) 9/1/1927 15c issue=1924 pneumatic ovpt=Cent. 15//bars oc=blk Somalia postage 10/10/1927 20c issue=Volta ovpt=Somalia//Italiana oc=blk |
External links: Colnect 57557-..Pneumatic_Mail Record of changes |
