The first day of Serbian postal service – May 25, 1840 (June 6 according to the new calendar). Postmark “framed BELGRADE”. Letter sent from Belgrade to Užice.
![[:sr]Савез филателиста Србије - СФС[:en]Union of Philatelists of Serbia - UPS[:]](https://philaserbia.org/wp-content/uploads/2023/05/sfs-logo-02.png){kind=logo}
The first day of work of the Serbian Post Office – “Framed BELGRADE”