Nazi Germany had a number of mints. Each mint location had its own identifiable letter. It is therefore possible to identify exactly which mint produced what coin by noting the mint mark on the coin. Not all mints were authorized to produce coins every year. The mints were also only authorized to produce a set number of coins with some mints allocated a greater production than others. Some of the coins with particular mint marks are therefore scarcer than others. On the smaller denomination Reichspfennig coins, the mint mark is found on the bottom center of the coin.