The rider on the camel is actually the postman, and he is delivering the mail between Khartoum and Berber. The "Camel postman", designed by Captain E.A. Stanton, appeared on Sudan's first stamps in 1898. It was used on coins from 1956 through 1971.
All coin images in Daniel's Coin Zoo are from my personal collection. I collect, research, and personally photograph every coin displayed on this site. PLEASE do not take my images without permission. If you would like to use any coin image you see, just ask me. Thank you.