It was considered as circulating coin for accounting reasons and was still minted in proof sets until the 2005 denomination of the currency.
The reverse, similar to other Romanian coins of the time, featured the denomination and year of minting within a wreath of laurel and oak.
On the obverse, the portrait was replaced with the full coat of arms of the Principality of Romania with the year below.
The full coat of arms moved to the reverse, with the country name on top and the denomination split either side.
The obverse bore a portrait of him in 1906, with the inscription CAROL I REGE AL ROMANIEI and '1866–1906' circling him.
The reverse design was similar to that of the French one franc coin, as both countries were in the Latin Monetary Union.
The reverse had a wreath of wheat at the bottom, with the denomination as BUN PENTRU (good for) 1 leu.
The reverse had the denomination split either side of a corn cob, with the engraver's name I. Jalea underneath.
It had the same diameter as the last one leu coin, but due to a new composition of 63% copper and 37% zinc, its weight fell to 2.5g.
The obverse featured the new state arms with country name above and year below, and the reverse had the denomination between sheafs of wheat.
[10] After People's Republic of Romania was proclaimed on 30 December 1947, an entirely new coin was minted ]n 1949, with a 16mm diameter and 1.83g weight.
In 1963 a new one leu coin was minted, with a 24mm diameter and weight of 5.06 g due to its composition of 5% nickel core and 95% steel plating.
The obverse featured a new version of the state arms with the country's official name circling it, and the date underneath.
[14] Post-communist Romania issued a one leu coin on 25 November 1992, with a total mintage of 60 million.
The obverse had the National Bank of Romania's monogram in the centre, surrounded by oak leaves with the country name at the top and year at the bottom.
The reverse featured the face value, 1 LEU, with ears of wheat on its sides and the name of the country, ROMANIA, at the top.