Namibia is famous for its well designed stamps. The following set, shows different headdresses of the ethnic groups of the country is an example of fine and well designed stamps. It is a set of 12 stamps designed by Mary Jane Volkmann and issued on two sheets on March 20, 2002.
On the back of the stamps there are descriptions. In the first printing, the descriptions were printed reversed. This mistake was corrected and few weeks later the sheets were reissued with correct description printing (although the "mistake" allows correct orientation when you put the two sides together).
Here are the first six stamps. I scanned the back and put the description together with the stamps: