The scales will look familiar if you know the coins of Bombay. However, this is an African coin. As the French were trying to connect west and East Africa and the British were trying to connect North and South Africa, the Germans were trying to catch up building a colonial empire. They all met South of the horn. The territory was taken. Arabs had colonized it long before. This coin is from the British zone of influence. It makes it abundantly clear that people were used to see coins of Bombay in circulation. Although the mintmark is not very clear, I believe it is CM for Calcutta.
This was not the first coin of Mombasa. Arabs had left their numismatic traces long ago. The second coin is the British Museum's copy of a 14th century coin minted at Tilwa, now in Tanzania.
Peter