obverse v. reverse

40th anniversary Concorde coin with an inlaid piece of the heat shield. Obverse (left) and reverse (right). The obverse of a coin is its front, or ‘heads’ side. The reverse of a coin is its back, or ‘tails’ side.

The obverse often prominently features the head of a head of state. The reverse may contain depictions of important individuals, symbolic animals or objects, historical events, significant buildings or monuments, or other emblematic designs.

The terms obverse and reverse are also used to describe paper money, flags, medals, and works of art.

Wikipedia on obverse v. reverse