ABOUT THIS SET
The set includes 7 banknotes with 7 important emperors on the front, and on the back side the motives depicted are showing roman architectural achievements or power of their armies, which where essential in order to rule to such an vast empire successfully.
The timeline covered is from the first emperor of Roman Empire, Augustus to the last emperor (of East and Western Empire) Constantine. The idea of the set is put in his time actualy, that is why there is no definite year od his death shown on the front of the note, like it is done on every other banknote.

CURRENCY NAME
Sestertius (also Sesterce) plural: sestertii or sesterces
Originally silver, its use died out until Augustus revived it and struck it in an alloy called orichalcum, which is very similar to brass, so the sesterce had a pleasing bright, golden appearance. The sesterce is also large and fairly thick, so artists had plenty of room to show their skills.
The sestertius was also used as a standard unit of account, represented on inscriptions with the monogram HS. It's difficult to make any comparisons with modern coinage or prices, but for most of the first century AD the ordinary legionary was paid 900 sestertii per year, less than 3 sestertii per day. Half of this was deducted for living costs, leaving the soldier (if he was lucky enough actually to get paid) with about 1.5 sestertii per day.

ISSUING AUTHORITY
Aerarium Imperium Romanum (Roman Empire Treasury)
Aerarium comes from Latin word "aes", in its derived sense of "money", which was the name given in Ancient Rome to the public treasury, and in a secondary sense to the public finances.

COAT OF ARMS
Coat of arms is presented by soldiers holding a shield with the abbreviation SPQR, which stood for 'senatus populusque romanus' and means 'the senate and the people of Rome'. The famous SPQR adorns many public buildings and statues of Rome and, most famously, it was engraved on the battle standards of the Roman legion.

THIS SET OF SESTERTIUS BANKNOTES is unique in many ways. Because it is supposed to represent the blend of old and new. To represent the ancient romans to modern generations.
In spirit of better understanding the Roman culture and the whole idea of the set, the names and values are given in latin and english, such as roman emperors names and other detail. Some things, such as latin proverbs on the back, are left intentionaly untraslated, so curious people would do that on their own…

For better understanding of dual value given on notes - in sestertius and other currency name,
the table here is given.