Old African Water Carrier

I need help in knowing when and where this was made in Africa, I know it has age due to the General wear but how old it is I don't have a clue. I purchased this with another wooden item at auction an old cosh. Please help with any info you have on the water carrier as my knowledge on African item's is not very good. Help with age of item and country/place where it was carved would be more than helpful. Thank you in advance for any help given.
Lee