"Under Louis XV, and Louis XVI, the sou was struck in copper, and had an intrinsic value of two deniers twelve grains, though retaining the conventional value of twelve deniers, and this coinage continued until the adoption of the existing decimal system in 1793." —Whitney, 1889
<p>This illustration shows the obverse of the coin, on which is illustrated a proclamation, a bunch of grapes, and a sheaf of wheat.

French Sou from 1793, Obverse

"Under Louis XV, and Louis XVI, the sou was struck in copper, and had an intrinsic value of two deniers…

"Under Louis XV, and Louis XVI, the sou was struck in copper, and had an intrinsic value of two deniers twelve grains, though retaining the conventional value of twelve deniers, and this coinage continued until the adoption of the existing decimal system in 1793." &mdash;Whitney, 1889
<p>This illustration shows the reverse of the coin, on which is displayed an oak wreath with a scale.

French Sou from 1793, Reverse

"Under Louis XV, and Louis XVI, the sou was struck in copper, and had an intrinsic value of two deniers…