20 dinars, Milan Obrenović IV

Following the recognition of full independence at the Berlin Congress in 1878, with the issuance of the first gold denomination of 20 dinars in 1879, Serbia fully fit into the Latin Monetary Union standards, and its money could be exchanged at equal parity for the currencies of the European monetary community. The significance of the first gold denomination minting was also evidenced by the fact that the National Assembly decided on its name by adopting the wording "Milan's gold coin". The first and only quantity of Serbian gold coins of 20 dinars from 1879, worth one million dinars, was minted in the French state mint in Paris (Hȏtel des Monnaiers).
Details (tags) and their meanings:
A - Paris mint mark
(anchor) - Engraver's mark Albert Désiré Barre, 1855-1878
(bee) - Designation of the Paris Mint Director Renauard de Bussière, 1860-1879
TASSET - Engraver's signature Ernst Paulini Tasset
Inscription on the rim: GOD GUARDS SERBIA