This is a Somaliland Protectorate stamp.  This is the King George VI SG 104, the 5 Rupee black.  It was issued on 6/13/1939.

It's Used and in GEM Condition!  It's valued at L75 in the Stanley Gibbons Catalogue.

If you like what you see, come check out our store!  We offer a wide variety of stamps, covers, and other materials for all your philatelic needs!