The merchant from whom I bought this old African photo could not identify the man but clearly the photograph had been taken a long time ago and was not preserved under the best conditions so the photograph is somewhat deteriorated. 

The overall dimensions are 17 1/4 x 13 3/8" (44 x 34 cm) The photo itself is 15 3/8 x 11 3/8" (39 x 29 cm)