9th July 2011
perf 12, litho
† No Gibbons listing found as at 22nd August 2017.
A £2.50 stamp was produced but not sold in South Sudan.
Wikipedia states that,
"South Sudan became an independent state on 9 July 2011, following a referendum that passed with 98.83% of the vote. South Sudan has suffered ethnic violence and has been in a civil war since 2013; as of 2017, it had the highest score on the Fragile States Index (formerly, the Failed States Index), surpassing Somalia."