The company yielded the resource following successful reclassification of greater than 95% of the in-situ resource.
African Energy said the lower main seam of the tenement accounted for 61% of the total 2.63Bt resource, containing coal suitable for washing to create an export quality product.
The upper main seam of the tenement can be washed or blended with the lower main seam middlings, producing a product suitable for use as power station fuel.
The coal occurs in one main seam which averages 14m thickness, is close to surface and is expected to be amenable to low strip-ratio open pit mining.
The Sese project has the potential to produce more than 20 million tonnes per annum of open-cut coal.
Stage 1 production at Sese will start in 2013, producing 1-2Mtpa of thermal coal.
The project is located 50km to the south of the mining hub of Francistown with nearby existing rail and road infrastructure connecting through to neighbouring Zimbabwe and South Africa.
A bankable feasibility is also underway, which is forecast for the completion by the end of 2012.