
Instant online coin toss. Heads or tails? Just flip a coin online!. Obverse and its opposite, reverse, refer to the two flat faces of coins and some other two-sided The obverse of a coin is commonly called heads, because it often depicts the head of a prominent person, and the reverse tails. In fields of. Obverse and its opposite, reverse, refer to the two flat faces of coins and some other two-sided The obverse of a coin is commonly called heads, because it often depicts the head of a prominent person, and the reverse tails. In fields of.