United States - c.1857 for this one! [cl]. Before the postman rang twice (and got a paycheck to do so!) - See: 'City Delivery Service [Argo glossary: ar]): "Carrier stamps prepaid the fee for service in taking a letter to or from the post office or between correspondents in the same city. The fee, 1cent or 2cents, varied among cities at the discretion of the local postmaster, usually in response to competition from local posts.", [info: The (Robert A.) Siegel Encyc.]
CARTILLA POSTAL DE ESPANA
Spain: franchise stamps
CARUPANO
Venezuela- Carupano (1902)
CASA DE CORREOS
(overprint on stamps of Ecuador): (postal tax for new post office building fund)
CASO
(overprint on stamps of Italy): Italy- Aegean Islands- Caso (1913)
CASTELORISO
(overprint on stamps of France): Castellorizo (1920)
CASTELORIZO
(overprint on stamps of France- Offices in Turkey): Castellorizo (1920)
CASTELROSSO
(overprint on stamps of Italy): Castellorizo (1922-32)