Obverse:
NAPOLEON III EMPEREUR
Bare-headed portrait of Napoleon III right
Signed BARRE is below the head [the engraver Jean-Jacques Barre (1793-1855)].
Reverse:
Inscription EMPIRE FRANCAIS; value 20 FRANCS and the date 1855 surrounded by a laurel wreath
The mintmark "A" (Paris) below the wreath.
The edge is inscribed in raised lettering DIEU PROTEGE LA FRANCE.
Weight: 6.2 g
Ø 21 mm